Wedge Locking Header Bolts - 3/8 x 3/4L (12)

PROFORM Wedge Locking Header Bolts in 3/8 x 3/4L configuration are engineered for serious engine builders and high-performance enthusiasts who demand reliability under extreme conditions. These header bolts are critical fasteners that secure your exhaust manifold or header to the cylinder head, designed to withstand constant thermal cycling, vibration, and the corrosive environment of hot exhaust gases.

Standard bolts can loosen over time, leading to exhaust leaks and potential engine damage. The wedge locking mechanism of these bolts prevents rotation and vibration-induced loosening without relying on adhesive threadlockers or nylon inserts that can fail under heat. At 3/8 inch diameter and 3/4 inch length, these bolts provide a balance between clamping force and ease of installation.

The set includes 12 bolts, weighing just 0.6 pounds, making them a lightweight yet secure option for various header applications. PROFORM's manufacturing standards ensure consistent thread quality and head geometry, which are critical factors when torquing fasteners to tight specifications. These bolts are ideal for high-performance engine builds where reliability is paramount.