PROFORM 66755 Wedge Locking Header Bolts for GM LS-Series, 8 mm x 1.18 in, Set of 12

Upgrade 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.
Constructed 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.
Each 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.

Features:

• Brand: PROFORM

• Part Number: 66755

• Application: GM LS-Series engines

• Fastener Type: Wedge locking header bolt

• Thread Size: 8 mm x 1.25

• Bolt Length: 1.18 inches

• Head Style: Hex head

• Material: Steel

• Finish: Nickel plated

• Quantity: Set of 12