{"title":"Exhaust Manifold\/Header Fastener Kits","description":null,"products":[{"product_id":"s-s-header-bolt-kit-3-8-x-750-uhl-21","title":"S\/S Header Bolt Kit - 3\/8 x .750 UHL (12)","description":"Header Bolt - 3\/8-16 in Thread - 0.75 in Long - 12 Point Head - Stainless - Polished - Universal - Set of 12","brand":"Auto Racing Products","offers":[{"title":"Default Title","offer_id":49223189758204,"sku":"BQDN_400-1207","price":24.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0763\/8797\/5420\/files\/ARP400-1207.jpg?v=1782329857"},{"product_id":"s-s-header-bolt-kit-6pt-gm-ls-1","title":"S\/S Header Bolt Kit - 6pt. 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1 in Long","description":"\u003ch2\u003eTrans-Dapt Performance 4904 Header Bolts - 1 in Long\u003c\/h2\u003e\u003cp\u003eTrans-Dapt Performance 4904 is listed in the supplied catalog as exhaust manifold\/header fastener kits: Header Bolts - 1 in Long.\u003c\/p\u003e\u003ch3\u003eProduct Details\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Trans-Dapt Performance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 4904\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Exhaust Manifold\/Header Fastener Kits\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Trans-Dapt Performance","offers":[{"title":"Default Title","offer_id":49276194128124,"sku":"FBLH_4904","price":8.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0763\/8797\/5420\/files\/TRA4904.jpg?v=1783795791"},{"product_id":"5-16-hex-header-bolts","title":"Trans-Dapt Performance 4900 5\/16 Hex Header Bolts","description":"\u003ch2\u003eTrans-Dapt Performance 4900 5\/16 Hex Header Bolts\u003c\/h2\u003e\u003cp\u003eTrans-Dapt Performance 4900 is listed in the supplied catalog as exhaust manifold\/header fastener kits: 5\/16 Hex Header Bolts.\u003c\/p\u003e\u003ch3\u003eProduct Details\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Trans-Dapt Performance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 4900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Exhaust Manifold\/Header Fastener Kits\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Trans-Dapt Performance","offers":[{"title":"Default Title","offer_id":49276196159740,"sku":"FBLH_4900","price":5.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0763\/8797\/5420\/files\/TRA4900.jpg?v=1783795826"},{"product_id":"mini-head-header-bolts-12","title":"Trans-Dapt Performance 8885 Mini Head Header Bolts (12)","description":"\u003ch2\u003eTrans-Dapt Performance 8885 Mini Head Header Bolts (12)\u003c\/h2\u003e\u003cp\u003eTrans-Dapt Performance 8885 is listed in the supplied catalog as exhaust manifold\/header fastener kits: Mini Head Header Bolts (12).\u003c\/p\u003e\u003ch3\u003eProduct Details\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Trans-Dapt Performance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 8885\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Exhaust Manifold\/Header Fastener Kits\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Trans-Dapt Performance","offers":[{"title":"Default Title","offer_id":49276196520188,"sku":"FBLH_8885","price":6.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0763\/8797\/5420\/files\/TRA8885.jpg?v=1783795832"},{"product_id":"trans-dapt-9943-header-bolts-for-big-block-chevy-and-ford-v8-3-8-16-thread-set-of-16","title":"TRANS-DAPT 9943 Header Bolts for Big Block Chevy and Ford V8, 3\/8-16 Thread, Set of 16","description":"Header Bolts Bbc (16)\n\u003cp\u003eTRANS-DAPT part number 9943 header bolts provide a reliable fastening solution for Big Block Chevy and Ford V8 header installations. Each bolt features a 3\/8-16 thread, a 3\/8-inch hex head, and a steel construction designed for dependable performance in automotive exhaust applications. The set includes 16 bolts for convenient installation or replacement of a complete header system.\u003cbr\u003eThe compact header bolt design helps provide clearance around exhaust manifolds and header flanges where standard fasteners may be difficult to access. The 3\/8-inch hex head supports installation with commonly used hand tools, while the coarse 3\/8-16 thread is suited to compatible engine and header mounting points. Verify thread and application compatibility before installation.\u003cbr\u003eDesigned for enthusiasts, restorers, and professional installers, TRANS-DAPT 9943 header bolts offer a practical way to secure headers on select Big Block Chevy and Ford V8 applications. Use the complete set when replacing worn or missing fasteners, or keep it available for engine assembly and exhaust system service. Follow the vehicle and header manufacturer’s recommended installation procedures and torque specifications.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eApplication: Designed for compatible Big Block Chevy and Ford V8 header installations\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eThread Size: 3\/8-16 coarse thread\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eHead Style: 3\/8-inch hex head for standard hand-tool installation\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eMaterial: Steel construction for dependable automotive use\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eQuantity: Set of 16 header bolts\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003ePart Number: TRANS-DAPT 9943\u003c\/li\u003e\u003c\/ul\u003e","brand":"TRANS-DAPT","offers":[{"title":"Default Title","offer_id":67644218638588,"sku":"TRA9943","price":10.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0763\/8797\/5420\/files\/TRA9943_ab16cf6e-a077-4379-8f29-a6392360adac.jpg?v=1791097419"},{"product_id":"trans-dapt-8885-mini-head-header-bolts-3-8-16-in-thread-3-4-in-long-set-of-12","title":"TRANS-DAPT 8885 Mini Head Header Bolts, 3\/8-16 in Thread, 3\/4 in Long, Set of 12","description":"Mini Head Header Bolts (12)\n\u003cp\u003eTRANS-DAPT Part Number 8885 Mini Head Header Bolts provide a secure, compact fastening solution for header installation and related exhaust applications. Designed with a 3\/8-16 in threaded body and a 3\/8 in hex head, these steel bolts are built for dependable fitment and practical installation where clearance around the header flange is limited. The set includes 12 bolts for convenient replacement or complete installation needs.\u003cbr\u003eCompatible with Mopar B-Series, Mopar RB-Series, Small Block Chevy, and Pontiac V8 applications, these header bolts are suited for enthusiasts, installers, and professional technicians working on a range of performance and replacement projects. The mini head design helps reduce interference with headers and surrounding components while maintaining a familiar hex-head installation profile.\u003cbr\u003eConstructed from steel for reliable service, TRANS-DAPT 8885 header bolts are a practical choice when replacing worn, damaged, or mismatched fasteners. Always verify the vehicle, engine, header configuration, thread specification, and required fastener length before installation to ensure proper fitment and safe assembly.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eBrand: TRANS-DAPT\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003ePart Number: 8885\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eProduct Type: Mini head header bolt set\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eThread Size: 3\/8-16 in\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eBolt Length: 3\/4 in\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eHead Style: 3\/8 in hex head\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eMaterial: Steel\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eApplication: Mopar B-Series, Mopar RB-Series, Small Block Chevy, and Pontiac V8\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eQuantity: Set of 12\u003c\/li\u003e\u003c\/ul\u003e","brand":"TRANS-DAPT","offers":[{"title":"Default Title","offer_id":67644313993468,"sku":"TRA8885","price":6.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0763\/8797\/5420\/files\/TRA8885_8145bfe7-2ecf-4a0f-bc27-fd3f9aae7f7e.jpg?v=1791101173"},{"product_id":"trans-dapt-4904-header-bolts-3-8-16-in-thread-1-in-long-7-16-in-hex-head-steel-set-of-12","title":"TRANS-DAPT 4904 Header Bolts, 3\/8-16 in Thread, 1 in Long, 7\/16 in Hex Head, Steel, Set of 12","description":"\u003cp\u003eTRANS-DAPT 4904 Header Bolts provide a reliable fastening solution for exhaust header installation and other automotive applications requiring durable hardware. Each bolt features a 3\/8-16 in thread, a 1 in length, and a 7\/16 in hex head designed for secure tool engagement during installation and removal. The universal design makes this set suitable for a wide range of compatible vehicles and header assemblies.\u003cbr\u003eConstructed from steel, these header bolts are built to provide dependable strength and resistance to the demands of engine-bay environments. Their standard thread specification supports compatibility with matching threaded holes and header components, while the hex-head configuration allows for straightforward tightening with commonly used tools. The compact profile is well suited for applications where clearance around the exhaust system is limited.\u003cbr\u003eEach package includes 12 TRANS-DAPT 4904 header bolts, making it convenient to replace multiple fasteners during a header installation, repair, or maintenance project. Verify thread size, bolt length, head clearance, and application requirements before installation to ensure proper fit and secure fastening. These bolts are supplied as a universal automotive hardware solution for professional technicians, repair shops, and do-it-yourself vehicle maintenance.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eBrand: TRANS-DAPT\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003ePart Number: 4904\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eProduct Type: Header bolt\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eThread Size: 3\/8-16 in\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eBolt Length: 1 in\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eHead Style: 7\/16 in hex head\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eMaterial: Steel\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eApplication: Universal automotive header and exhaust fastening\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eQuantity: Set of 12\u003c\/li\u003e\u003c\/ul\u003e","brand":"TRANS-DAPT","offers":[{"title":"Default Title","offer_id":67644330344700,"sku":"TRA4904","price":8.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0763\/8797\/5420\/files\/TRA4904_1833c0cf-3bc8-42a6-9466-5bf075e7a5c6.jpg?v=1791102763"},{"product_id":"trans-dapt-4900-5-16-18-hex-header-bolts-for-small-block-mopar-set-of-12","title":"TRANS-DAPT 4900 5\/16-18 Hex Header Bolts for Small Block Mopar, Set of 12","description":"5\/16 Hex Header Bolts\n\u003cp\u003eTRANS-DAPT part number 4900 header bolts provide a reliable fastening solution for Small Block Mopar exhaust header installations. Each bolt features a 5\/16-18 thread and a 7\/16-inch hex head designed for secure tightening with common hand tools. The compact bolt profile is well suited for header applications where clearance around the fastener is limited.\u003cbr\u003eConstructed from durable steel, these TRANS-DAPT header bolts are designed to provide dependable strength and long-term service in demanding automotive environments. The 0.75-inch length helps support proper engagement when installing compatible headers and related exhaust components, while the standard thread specification promotes fitment with matching Small Block Mopar applications.\u003cbr\u003eThis set includes 12 header bolts, providing a complete fastening package for many installation projects or a convenient replacement set for worn, damaged, or missing hardware. Verify thread, length, head style, and vehicle compatibility before installation. Proper tightening procedures should follow the header manufacturer’s recommendations to help ensure a secure, leak-resistant connection.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eBrand: TRANS-DAPT\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003ePart Number: 4900\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eApplication: Small Block Mopar header installations\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eThread Size: 5\/16-18\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eBolt Length: 0.75 inch\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eHead Style: 7\/16-inch hex head\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eMaterial: Steel\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eQuantity: Set of 12\u003c\/li\u003e\u003c\/ul\u003e","brand":"TRANS-DAPT","offers":[{"title":"Default Title","offer_id":67644330475772,"sku":"TRA4900","price":5.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0763\/8797\/5420\/files\/TRA4900_19428001-4c74-4aec-94a8-2982c25dcead.jpg?v=1791102782"},{"product_id":"spectre-spe-46723-header-bolt-kit-3-8-16-thread-0-875-in-long-allen-head-steel-set-of-12","title":"SPECTRE SPE-46723 Header Bolt Kit, 3\/8-16 Thread, 0.875 in Long, Allen Head, Steel, Set of 12","description":"Header Bolt Kit 0.875in Allen Head Bolts\n\u003cp\u003eThe SPECTRE SPE-46723 Header Bolt Kit provides a dependable fastening solution for header installation and related automotive exhaust applications. Each bolt features a 3\/8-16 thread and a 0.875-inch length, making this set suitable for replacing worn or missing header hardware on a wide range of universal applications. The included Allen-style head allows for secure tool engagement in areas where access may be limited.\u003cbr\u003eConstructed from durable steel, these header bolts are finished with a cadmium coating to help improve corrosion resistance and provide reliable service in demanding engine-bay environments. The compact head design supports a clean installation while maintaining strong clamping force when properly installed. SPECTRE manufactures this hardware for enthusiasts, installers, and technicians who need consistent fit and dependable performance during exhaust system assembly or repair.\u003cbr\u003eThis kit includes 12 bolts, providing enough hardware for a complete installation or convenient replacement of multiple fasteners. Verify thread compatibility and application requirements before installation, and follow the vehicle or header manufacturer’s recommended torque specifications. The SPECTRE SPE-46723 Header Bolt Kit is a practical choice for maintaining a secure connection between headers and related components.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eBrand: SPECTRE\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003ePart Number: SPE-46723\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eApplication: Universal header and automotive exhaust hardware\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eThread Size: 3\/8-16\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eBolt Length: 0.875 in\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eHead Style: Hex\/Allen head\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eMaterial: Steel\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eFinish: Cadmium\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eQuantity: Set of 12\u003c\/li\u003e\u003c\/ul\u003e","brand":"SPECTRE","offers":[{"title":"Default Title","offer_id":67644781560060,"sku":"SPE46723","price":16.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0763\/8797\/5420\/files\/SPE46723.jpg?v=1791116575"},{"product_id":"spectre-spe-46703-header-bolts-3-8-16-in-thread-3-4-in-length-hex-head-steel-set-of-12","title":"SPECTRE SPE-46703 Header Bolts, 3\/8-16 in Thread, 3\/4 in Length, Hex Head, Steel, Set of 12","description":"Header Bolts Hex Head\n\u003cp\u003eSecure your exhaust header installation with SPECTRE SPE-46703 Header Bolts. Designed with a 3\/8-16 in thread and a 3\/4 in length, these fasteners provide a dependable fit for compatible header and exhaust applications. The hex\/Allen-style head supports straightforward installation with the appropriate tool while helping maintain a clean, professional appearance.\u003cbr\u003eManufactured from steel and finished with a cadmium coating, these SPECTRE header bolts are built for reliable service in demanding under-hood environments. The finish helps provide added surface protection, while the durable steel construction supports consistent clamping performance when properly installed. Their universal application makes them a practical choice for replacement hardware or project builds where compatible thread specifications are required.\u003cbr\u003eEach set includes 12 SPECTRE SPE-46703 header bolts, providing enough hardware for many complete header installations or service replacements. Always verify thread size, bolt length, head clearance, and application requirements before installation. Use the manufacturer’s recommended torque specifications and installation procedures to help ensure a secure, properly aligned connection.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eBrand: SPECTRE\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003ePart Number: SPE-46703\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eApplication: Universal header and exhaust hardware\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eThread Size: 3\/8-16 in\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eBolt Length: 3\/4 in\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eHead Style: Hex\/Allen head\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eMaterial: Steel\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eFinish: Cadmium\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eQuantity: Set of 12\u003c\/li\u003e\u003c\/ul\u003e","brand":"SPECTRE","offers":[{"title":"Default Title","offer_id":67644782117116,"sku":"SPE46703","price":18.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0763\/8797\/5420\/files\/SPE46703.jpg?v=1791116593"},{"product_id":"proform-66826-wedge-locking-header-bolts-8-mm-x-1-50-thread-1-181-in-long-set-of-16","title":"PROFORM 66826 Wedge Locking Header Bolts, 8 mm x 1.50 Thread, 1.181 in Long, Set of 16","description":"Wedge Locking Header Bolts 8mm x 1.181L\n\u003cp\u003ePROFORM 66826 Wedge Locking Header Bolts provide a dependable fastening solution for header and exhaust system applications. Designed with an 8 mm x 1.50 thread and a 1.181-inch length, these bolts offer reliable fitment for compatible installations while helping secure components against loosening caused by vibration and engine movement.\u003cbr\u003eThe locking design uses a wedge-locking fastening principle to maintain clamping force under demanding operating conditions. Each bolt features a hex head for straightforward installation with common hand tools, while the steel construction provides the strength needed for automotive use. A nickel-plated finish adds corrosion resistance and supports long-term durability in areas exposed to heat, moisture, and road conditions.\u003cbr\u003eThis PROFORM set includes 16 header bolts, making it suitable for complete installation or replacement of multiple fasteners. The bolts are intended for applications requiring an 8 mm x 1.50 thread and should be matched to the vehicle, header, and installation requirements before use. Follow the header manufacturer’s recommended tightening procedure and torque specifications for proper performance.\u003cbr\u003eFeature: Brand - PROFORM\u003cbr\u003eFeature: Part Number - 66826\u003cbr\u003eFeature: Application - Header and exhaust system fastening\u003cbr\u003eFeature: Thread Size - 8 mm x 1.50\u003cbr\u003eFeature: Length - 1.181 inches\u003cbr\u003eFeature: Head Style - Hex head\u003cbr\u003eFeature: Locking Design - Wedge-locking construction helps resist loosening from vibration\u003cbr\u003eFeature: Material - Steel\u003cbr\u003eFeature: Finish - Nickel plated for added corrosion resistance\u003cbr\u003eFeature: Quantity - Set of 16 bolts\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003ePROFORM 66826 header bolts for compatible automotive header and exhaust applications\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003e8 mm x 1.50 thread with a 1.181-inch bolt length\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eWedge-locking design helps maintain clamping force under vibration\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eHex head supports installation with common hand tools\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eSteel construction with a nickel-plated finish\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eSet includes 16 bolts for complete or multi-fastener installations\u003c\/li\u003e\u003c\/ul\u003e","brand":"PROFORM","offers":[{"title":"Default Title","offer_id":67646118199548,"sku":"PFM66826","price":39.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0763\/8797\/5420\/files\/PFM66826.jpg?v=1791146348"},{"product_id":"proform-66825-wedge-locking-header-bolts-3-8-16-x-1-inch-hex-head-set-of-16","title":"PROFORM 66825 Wedge Locking Header Bolts, 3\/8-16 x 1 Inch, Hex Head, Set of 16","description":"Wedge Locking Header Bolts 3\/8 x 1in L (16)\n\u003cp\u003eSecure header components with PROFORM 66825 Wedge Locking Header Bolts, designed for dependable installation and long-term performance in automotive exhaust and engine applications. Each bolt features a 3\/8-16 inch thread and a 1-inch length, providing a practical fit for compatible header assemblies and related fastening needs.\u003cbr\u003eThe wedge-locking design helps resist loosening caused by vibration and thermal cycling, supporting a more secure connection than standard fasteners. A hex head allows straightforward installation with common hand tools, while the steel construction delivers the strength needed for demanding under-hood environments. The nickel-plated finish adds corrosion resistance and provides a clean, durable surface.\u003cbr\u003eThis PROFORM set includes 16 locking header bolts, making it convenient for replacing a complete set of header fasteners or keeping matched spares available for future service. Verify thread size, bolt length, and head clearance against your application before installation. PROFORM Part Number 66825 is a practical choice for builders, restorers, and performance enthusiasts seeking reliable header hardware.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eBrand: PROFORM\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003ePart Number: 66825\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eApplication: Locking header bolts for compatible automotive header assemblies\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eThread Size: 3\/8-16 inch\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eLength: 1 inch\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eHead Style: Hex head\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eMaterial: Steel\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eFinish: Nickel plated\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eQuantity: Set of 16\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eLocking Design: Wedge-style construction helps resist loosening from vibration and heat cycles\u003c\/li\u003e\u003c\/ul\u003e","brand":"PROFORM","offers":[{"title":"Default Title","offer_id":67646118265084,"sku":"PFM66825","price":39.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0763\/8797\/5420\/files\/PFM66825.jpg?v=1791146353"},{"product_id":"proform-66824-wedge-locking-header-bolts-3-8-16-in-thread-1-in-long-set-of-12","title":"PROFORM 66824 Wedge Locking Header Bolts, 3\/8-16 in Thread, 1 in Long, Set of 12","description":"Wedge Locking Header Bolts 3\/8 x 1in L (12)\n\u003cp\u003eSecure header components with PROFORM 66824 Wedge Locking Header Bolts. Designed for automotive exhaust and header applications, these bolts feature a 3\/8-16 inch thread and a 1-inch length for dependable installation and retention. The locking wedge design helps resist loosening caused by engine vibration, supporting a more secure connection during regular operation.\u003cbr\u003eConstructed from steel and finished with nickel plating, these PROFORM header bolts provide durable performance and improved resistance to corrosion. The hex-head design allows for straightforward installation with commonly used tools, making them a practical choice for performance builds, repairs, and replacement applications. Their compact design is well suited for headers and other areas where reliable fastening is essential.\u003cbr\u003eEach set includes 12 PROFORM 66824 Wedge Locking Header Bolts, providing enough hardware for many complete header installations or maintenance projects. Verify thread size, bolt length, and application requirements before installation to ensure proper fitment. Use the manufacturer’s recommended tightening procedure for the best results.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eBrand: PROFORM\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003ePart Number: 66824\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eProduct Type: Wedge locking header bolt set\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eThread Size: 3\/8-16 inch\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eBolt Length: 1 inch\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eHead Style: Hex head\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eMaterial: Steel\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eFinish: Nickel plated\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eQuantity: Set of 12\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eApplication: Automotive headers and exhaust fastening\u003c\/li\u003e\u003c\/ul\u003e","brand":"PROFORM","offers":[{"title":"Default Title","offer_id":67646118297852,"sku":"PFM66824","price":34.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0763\/8797\/5420\/files\/PFM66824.jpg?v=1791146357"},{"product_id":"proform-66823-wedge-locking-header-bolts-3-8-16-x-3-4-in-hex-head-nickel-plated-steel-set-of-16","title":"PROFORM 66823 Wedge Locking Header Bolts, 3\/8-16 x 3\/4 in, Hex Head, Nickel-Plated Steel, Set of 16","description":"Wedge Locking Header Bolts 3\/8 x 3\/4L (16)\n\u003cp\u003ePROFORM 66823 Wedge Locking Header Bolts provide a reliable fastening solution for header installation and other automotive exhaust applications. Each bolt features a 3\/8-16 thread and a 3\/4-inch length, making it suitable for compatible header flanges and mounting points. The hex-head design supports straightforward installation with common hand tools, while the locking configuration helps resist loosening caused by engine vibration.\u003cbr\u003eManufactured from steel and finished with nickel plating, these PROFORM header bolts offer durable construction and improved resistance to corrosion and surface wear. The nickel-plated finish also provides a clean, professional appearance for engine compartments and custom vehicle builds. Verify thread compatibility, bolt length, and clearance before installation to ensure proper engagement and secure assembly.\u003cbr\u003eThis set includes 16 PROFORM locking header bolts, providing enough fasteners for many complete header installations or replacement needs. The bolts are designed for automotive enthusiasts, installers, and performance builders seeking dependable hardware from a recognized automotive parts brand. Always follow the header manufacturer's installation instructions and recommended torque specifications for best results. The package is not air restricted and does not require truck freight shipping.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eBrand: PROFORM\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003ePart Number: 66823\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eApplication: Locking header bolts for compatible automotive header installations\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eThread Size: 3\/8-16\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eLength: 3\/4 inch\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eHead Style: Hex head\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eMaterial: Steel\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eFinish: Nickel plated for corrosion and wear resistance\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eQuantity: Set of 16 bolts\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eInstallation Benefit: Locking design helps resist loosening from vibration\u003c\/li\u003e\u003c\/ul\u003e","brand":"PROFORM","offers":[{"title":"Default Title","offer_id":67646118330620,"sku":"PFM66823","price":39.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0763\/8797\/5420\/files\/PFM66823.jpg?v=1791146362"},{"product_id":"proform-66757-wedge-locking-header-bolts-3-8-16-x-1-inch-hex-head-black-oxide-steel-set-of-6","title":"PROFORM 66757 Wedge Locking Header Bolts, 3\/8-16 x 1 Inch, Hex Head, Black Oxide Steel, Set of 6","description":"Wedge Locking Header Bolts - 3\/8in x 1in\n\u003cp\u003eSecure header and collector connections with PROFORM 66757 Wedge Locking Header Bolts. Designed with a 3\/8-16 inch thread and 1-inch length, these specialized bolts provide a dependable fastening solution for automotive exhaust and header applications. The locking wedge design helps resist loosening caused by engine vibration, while the hex head supports straightforward installation with commonly used tools.\u003cbr\u003eManufactured from durable steel, each bolt features a black oxide finish that provides a clean appearance and helps support corrosion resistance in typical automotive environments. The set includes six bolts, making it a practical choice for replacing worn hardware or completing a compatible header installation. Their compact design is intended to simplify access in confined engine compartments while maintaining reliable clamping force.\u003cbr\u003ePROFORM part number 66757 is suitable for builders, technicians, and performance enthusiasts who need purpose-built collector hardware. Before installation, confirm the required thread size, bolt length, clearance, and application compatibility. Install using the vehicle or component manufacturer’s recommended tightening specifications and inspect the assembled connection periodically as part of routine maintenance.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eThread: 3\/8-16 inch thread for compatible header and collector applications\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eLength: 1 inch bolt length for appropriate fastening depth\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eLocking Design: Wedge locking feature helps resist loosening from vibration\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eHead Style: Hex head supports installation with standard tools\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eMaterial: Steel construction for dependable automotive service\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eFinish: Black oxide coating for a professional appearance and added surface protection\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eQuantity: Set includes six locking header bolts\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eApplication: Designed for compatible automotive headers and collector connections\u003c\/li\u003e\u003c\/ul\u003e","brand":"PROFORM","offers":[{"title":"Default Title","offer_id":67646121607420,"sku":"PFM66757","price":26.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0763\/8797\/5420\/files\/PFM66757.jpg?v=1791146502"},{"product_id":"proform-66756-wedge-locking-header-bolts-3-8-16-x-1-inch-hex-head-black-oxide-steel-set-of-16","title":"PROFORM 66756 Wedge Locking Header Bolts, 3\/8-16 x 1 Inch, Hex Head, Black Oxide Steel, Set of 16","description":"Wedge Locking Header Bolts 3\/8in x 1in 16pcs.\n\u003cp\u003eUpgrade your exhaust installation with PROFORM 66756 Wedge Locking Header Bolts, engineered for secure header fastening on Chevy V8 applications. Each bolt features a 3\/8-16 thread, 1-inch length, and hex head design for dependable installation with standard tools. The set includes 16 bolts, providing a complete fastening solution for many header applications.\u003cbr\u003eThe integrated wedge-locking design helps resist loosening caused by engine vibration and thermal cycling, supporting consistent clamping force during operation. Constructed from steel and finished with a black oxide coating, these bolts provide reliable strength and a clean, understated appearance suitable for performance and restoration builds.\u003cbr\u003ePROFORM 66756 header bolts are a practical choice for replacing worn or conventional fasteners during header installation or service. Verify thread size, bolt length, and application compatibility before installation. Follow the header manufacturer’s recommended torque specifications and installation procedures for best results.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eApplication: Designed for Chevy V8 header installations\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eThread Size: 3\/8-16 inch\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eBolt Length: 1 inch\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eHead Style: Hex head for straightforward installation\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eLocking Design: Wedge-locking construction helps resist loosening from vibration and heat\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eMaterial: Durable steel construction\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eFinish: Black oxide coating\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eQuantity: Set of 16 header bolts\u003c\/li\u003e\u003c\/ul\u003e","brand":"PROFORM","offers":[{"title":"Default Title","offer_id":67646121640188,"sku":"PFM66756","price":37.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0763\/8797\/5420\/files\/PFM66756.jpg?v=1791146507"},{"product_id":"proform-66755-wedge-locking-header-bolts-for-gm-ls-series-8-mm-x-1-18-in-set-of-12","title":"PROFORM 66755 Wedge Locking Header Bolts for GM LS-Series, 8 mm x 1.18 in, Set of 12","description":"Wedge Locking Header Bolts LS 8mm x 1.18in\n\u003cp\u003eUpgrade the header installation on your GM LS-Series engine with PROFORM 66755 Wedge Locking Header Bolts. Designed with an 8 mm x 1.25 thread and a 1.18-inch length, these bolts provide a secure, dependable fastening solution for compatible exhaust header applications. The wedge-locking design helps resist loosening caused by engine vibration and thermal cycling, supporting long-term fastener retention.\u003cbr\u003eConstructed from durable steel and finished with nickel plating, these PROFORM header bolts offer corrosion resistance and a clean appearance in the engine compartment. The hex-head design allows for straightforward installation with standard tools, making them well suited for engine builders, performance enthusiasts, and professional technicians working on GM LS-Series applications.\u003cbr\u003eEach set includes 12 locking header bolts, providing the quantity needed for a complete compatible header installation. Use the PROFORM part number 66755 when confirming application and fitment requirements for your specific engine and header combination. Proper installation using the manufacturer’s recommended torque specifications is advised for reliable performance.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eBrand: PROFORM\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003ePart Number: 66755\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eApplication: GM LS-Series engines\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eFastener Type: Wedge locking header bolt\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eThread Size: 8 mm x 1.25\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eBolt Length: 1.18 inches\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eHead Style: Hex head\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eMaterial: Steel\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eFinish: Nickel plated\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eQuantity: Set of 12\u003c\/li\u003e\u003c\/ul\u003e","brand":"PROFORM","offers":[{"title":"Default Title","offer_id":67646121672956,"sku":"PFM66755","price":34.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0763\/8797\/5420\/files\/PFM66755.jpg?v=1791146511"},{"product_id":"proform-66754-wedge-locking-header-bolts-for-gm-ls-series-8-mm-x-1-25-thread-0-984-in-long-set-of-12","title":"PROFORM 66754 Wedge Locking Header Bolts for GM LS-Series, 8 mm x 1.25 Thread, 0.984 in Long, Set of 12","description":"Wedge Locking Header Bolts LS 8mm x .984in\n\u003cp\u003ePROFORM 66754 Wedge Locking Header Bolts are designed for secure header installation on GM LS-Series engines. Each bolt features an 8 mm x 1.25 thread and a 0.984-inch length, providing a dependable fit for compatible applications. The locking design helps resist loosening caused by engine vibration, making these bolts a practical choice for performance builds, repairs, and replacement installations.\u003cbr\u003eConstructed from steel and finished with nickel plating, these PROFORM header bolts offer durability and corrosion resistance for long-lasting service. The hex-head design supports straightforward installation with commonly used hand tools, while the locking wedge feature helps maintain clamping force after installation. The set includes 12 bolts for convenient replacement of a complete header fastener set or for use on a compatible portion of a GM LS-Series exhaust system.\u003cbr\u003eFor reliable fitment, verify the engine and header application before installation. Clean mating surfaces and use the manufacturer’s recommended tightening procedure to help achieve proper sealing and fastener performance. PROFORM Part Number 66754 is supplied as a 12-piece set and is intended for automotive enthusiasts, professional technicians, and builders who need durable locking header hardware without unnecessary installation complexity.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eApplication: Designed for compatible GM LS-Series header installations\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eThread Size: 8 mm x 1.25\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eBolt Length: 0.984 inch\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eHead Style: Hex head for convenient tool access\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eLocking Design: Wedge locking feature helps resist loosening from vibration\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eMaterial: Durable steel construction\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eFinish: Nickel plated for added corrosion resistance\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eQuantity: Set includes 12 header bolts\u003c\/li\u003e\u003c\/ul\u003e","brand":"PROFORM","offers":[{"title":"Default Title","offer_id":67646121705724,"sku":"PFM66754","price":34.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0763\/8797\/5420\/files\/PFM66754.jpg?v=1791146516"},{"product_id":"proform-66753-wedge-locking-header-bolts-3-8-16-x-1-inch-hex-head-black-oxide-steel-set-of-12","title":"PROFORM 66753 Wedge-Locking Header Bolts, 3\/8-16 x 1 Inch, Hex Head, Black Oxide Steel, Set of 12","description":"Wedge Locking Header Bolts - 3\/8 x 1in (12)\n\u003cp\u003ePROFORM Part Number 66753 wedge-locking header bolts provide a secure, dependable fastening solution for header installation and other high-vibration automotive applications. Each bolt features a 3\/8-16 thread and a 1-inch length, offering compatibility with matching threaded components while supporting a clean, professional installation. The hex-head design allows for straightforward tightening with common hand tools.\u003cbr\u003eConstructed from durable steel, these header bolts feature a black oxide finish that helps provide corrosion resistance and a clean appearance. The wedge-locking design helps resist loosening caused by vibration, making these fasteners well suited for performance vehicles, custom builds, restorations, and general automotive repair. Their specialized construction supports reliable clamping force when properly installed according to the vehicle or component manufacturer’s requirements.\u003cbr\u003eThis PROFORM 66753 set includes 12 header bolts, making it convenient for complete header installation or replacement of multiple fasteners. The compact fastener design is suitable for applications where dependable retention and easy serviceability are important. Use compatible washers or accessories as required by the specific installation, and verify thread size, length, and clearance before assembly.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eBrand: PROFORM\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003ePart Number: 66753\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eApplication: Header installation and other high-vibration automotive fastening applications\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eThread Size: 3\/8-16 inch\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eLength: 1 inch\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eHead Style: Hex head\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eMaterial: Steel\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eFinish: Black oxide\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eLocking Design: Wedge-locking construction helps resist loosening from vibration\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eQuantity: Set of 12 bolts\u003c\/li\u003e\u003c\/ul\u003e","brand":"PROFORM","offers":[{"title":"Default Title","offer_id":67646121771260,"sku":"PFM66753","price":34.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0763\/8797\/5420\/files\/PFM66753.jpg?v=1791146521"},{"product_id":"proform-66752-wedge-locking-header-bolts-3-8-16-x-3-4-inch-hex-head-set-of-16","title":"PROFORM 66752 Wedge Locking Header Bolts, 3\/8-16 x 3\/4 Inch, Hex Head, Set of 16","description":"Wedge Locking Header Bolts - 3\/8 x 3\/4L (16)\n\u003cp\u003ePROFORM 66752 Wedge Locking Header Bolts provide a dependable fastening solution for header and exhaust system installations. Designed with a 3\/8-16 inch thread and a 3\/4-inch bolt length, these bolts are sized for common header applications while offering secure engagement with compatible threaded holes or nuts. The hex-head design supports straightforward installation with standard hand tools.\u003cbr\u003eManufactured from steel and finished with a black oxide coating, these PROFORM header bolts offer a durable surface and a clean, professional appearance. The wedge-locking design helps resist loosening caused by vibration, making the set well suited for performance vehicles, street cars, and other applications where exhaust components experience repeated heat cycles and movement. Their compact construction helps simplify installation in areas with limited clearance around headers and related components.\u003cbr\u003eEach set includes 16 bolts, providing the quantity needed for many multi-cylinder header installations or replacement projects. Use the PROFORM 66752 set when replacing worn, damaged, or missing header hardware and match the thread size and bolt length to the application before installation. Proper torque and installation practices should follow the header manufacturer’s recommendations to help ensure reliable fitment and service.\u003cbr\u003ePROFORM 66752 Wedge Locking Header Bolts combine a standard 3\/8-16 inch thread, 3\/4-inch length, hex-head configuration, steel construction, and black oxide finish in one convenient hardware set. They are a practical choice for securing headers and exhaust components where vibration resistance and consistent fastening are important.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eBrand: PROFORM\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003ePart Number: 66752\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eApplication: Header and exhaust system fastening\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eThread Size: 3\/8-16 inch\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eBolt Length: 3\/4 inch\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eHead Style: Hex head\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eLocking Design: Wedge locking construction helps resist loosening from vibration\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eMaterial: Steel\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eFinish: Black oxide\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eQuantity: Set of 16\u003c\/li\u003e\u003c\/ul\u003e","brand":"PROFORM","offers":[{"title":"Default Title","offer_id":67646121804028,"sku":"PFM66752","price":37.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0763\/8797\/5420\/files\/PFM66752.jpg?v=1791146525"},{"product_id":"proform-66751-wedge-locking-header-bolts-3-8-16-x-3-4-inch-hex-head-black-oxide-steel-set-of-12","title":"PROFORM 66751 Wedge Locking Header Bolts, 3\/8-16 x 3\/4 Inch, Hex Head, Black Oxide Steel, Set of 12","description":"Wedge Locking Header Bolts - 3\/8 x 3\/4L (12)\n\u003cp\u003eSecure your exhaust header installation with PROFORM 66751 Wedge Locking Header Bolts. Designed with a 3\/8-16 inch thread and a 3\/4-inch length, these bolts provide a dependable fastening solution for header applications where vibration resistance and consistent clamping are important. The hex-head design allows for straightforward installation with common hand tools, helping simplify assembly and maintenance work.\u003cbr\u003eManufactured from steel and finished with a black oxide coating, these PROFORM header bolts deliver durable performance and a clean, professional appearance. The wedge-locking design helps maintain fastening tension under vibration, making the set well suited for automotive exhaust systems, performance builds, and other demanding applications. Their compact profile supports installation in areas where access may be limited around the header flange.\u003cbr\u003eEach PROFORM 66751 set includes 12 header bolts for completing a multi-point installation or keeping replacement fasteners available for future service. Use these bolts when upgrading, repairing, or installing compatible headers and related exhaust components. Always confirm thread size, bolt length, and application requirements before installation to ensure proper fit and secure assembly.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eBrand: PROFORM\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003ePart Number: 66751\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eApplication: Wedge locking header bolts for compatible automotive exhaust and header installations\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eThread Size: 3\/8-16 inch\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eLength: 3\/4 inch\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eHead Style: Hex head\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eMaterial: Steel\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eFinish: Black oxide\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eVibration Resistance: Wedge-locking design helps maintain clamping tension\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eQuantity: Set of 12\u003c\/li\u003e\u003c\/ul\u003e","brand":"PROFORM","offers":[{"title":"Default Title","offer_id":67646121836796,"sku":"PFM66751","price":34.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0763\/8797\/5420\/files\/PFM66751.jpg?v=1791146529"}],"url":"https:\/\/ozkonickustomz.com\/collections\/exhaust-manifold-header-fastener-kits.oembed?page=2","provider":"Ozkonic Kustomz LLC","version":"1.0","type":"link"}