{"product_id":"wiseco-k398x3905-gm-ls-series-forged-piston-and-ring-set-3-905-inch-bore-flat-top","title":"Wiseco K398X3905 GM LS-Series Forged Piston and Ring Set, 3.905-Inch Bore, Flat Top","description":"GM LS Series Piston Set 3.905 Bore -3.2cc\n\u003cp\u003eThe Wiseco K398X3905 piston and ring set is engineered for GM LS-Series engines using a standard-stroke configuration and a 3.905-inch bore. This kit includes forged flat-top pistons designed to provide dependable strength and consistent performance in high-performance street, competition, and engine-build applications. The flat-top crown design delivers a measured minus 3.20 cc volume, helping builders calculate compression ratio accurately during engine assembly.\u003cbr\u003eThe forged construction offers excellent durability under demanding operating conditions, while the 1.304-inch compression height supports proper piston positioning within compatible LS-Series combinations. The included ring package uses 1.2 x 1.2 x 3.0 mm grooves, providing a modern, low-friction configuration for efficient sealing and controlled oil management. Verify bore size, compression height, ring specifications, deck height, connecting rod length, and intended engine application before installation.\u003cbr\u003eDesigned as a complete piston and ring kit, the Wiseco K398X3905 helps simplify component selection for GM LS-Series builds. Its precision-focused design supports consistent cylinder-to-cylinder performance when paired with properly prepared bores and accurately set clearances. Professional installation is recommended, including measurement of piston-to-wall clearance, ring end gap, valve-to-piston clearance, and final compression ratio according to the engine builder’s specifications. This kit is not air restricted and does not require truck freight handling.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eBrand: Wiseco\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003ePart Number: K398X3905\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eApplication: GM LS-Series engines\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eConfiguration: Standard stroke\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eConstruction: Forged piston\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eCrown Design: Flat top\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eBore Size: 3.905 inches\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eCompression Height: 1.304 inches\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eRing Groove Configuration: 1.2 x 1.2 x 3.0 mm\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003ePiston Volume: Minus 3.20 cc\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eKit Contents: Pistons and rings\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eShipping Classification: Not air restricted and not truck freight only\u003c\/li\u003e\u003c\/ul\u003e","brand":"WISECO","offers":[{"title":"Default Title","offer_id":67644090155260,"sku":"WISK398X3905","price":982.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0763\/8797\/5420\/files\/WISK398X3905_a15a9659-86d2-48c7-8ce2-be43c5dd4415.jpg?v=1791086784","url":"https:\/\/ozkonickustomz.com\/products\/wiseco-k398x3905-gm-ls-series-forged-piston-and-ring-set-3-905-inch-bore-flat-top","provider":"Ozkonic Kustomz LLC","version":"1.0","type":"link"}