Wedge Locking Header Bolts 8mm x 1.181L

The Wedge Locking Header Bolts 8mm x 1.181L from PROFORM are designed to securely fasten high-temperature exhaust manifolds and headers. These fasteners are ideal for engine builders and performance enthusiasts, addressing the common issue of bolt loosening due to vibration and thermal cycling. Their innovative design ensures reliability in both street and race engine applications.

Each bolt features an 8mm diameter and a length of 1.181 inches, making them suitable for standard header flange applications. The wedge locking mechanism effectively maintains clamp load, preventing exhaust leaks and gasket failure without the need for additional locking devices. This design is crucial for maintaining consistent clamping force across varying temperatures.

These header bolts are compatible with small-block and mid-size engine platforms, including LS, SB Chevy, and SB Ford, and can be used with both cast-iron and aluminum manifolds. Their reliable performance is essential for high-performance applications where engine vibration and thermal extremes are prevalent. Installation is straightforward, requiring only standard socket tools.