Proform Exhaust Header Bolt (MPN: 66754)

Durable locking bolts designed for Chevy LS engines with advanced wedge-locking technology.

Proform Exhaust Header Bolts are engineered specifically for Chevy LS engines, featuring a robust Grade 8 steel construction that ensures durability and reliability. Each bolt is equipped with a hex head and a black oxide finish, providing both strength and corrosion resistance. The unique wedge-locking technology incorporated into these bolts prevents loosening due to vibrations, making them a practical choice for high-performance applications.

The design includes special wedge-locking washers that enhance the grip between the bolt head and the header surface. When torqued to the recommended 28 feet-pounds, these washers create a secure locking mechanism that increases tension rather than relying on friction. This innovative approach allows for easy removal and reinstallation, as the bolts can be lubricated and reused without compromising their locking capability.

With a thread size of 8 millimeters and a length of 0.984 inches, these locking bolts are compatible with headers featuring a 1/4 inch wide flange. The Proform Exhaust Header Bolts are sold in sets of 12, making them suitable for complete installations or replacements.

Features

• Grade 8 Steel Construction
• Features A Nickle Finish
• Hex Head Type
• For Chevy LS Engines With 1/4 Inch Wide Flange
• Wedge-Locking Technology Eliminates Constantly Re-Tightening Exhaust Collector Bolts, Blocks Bolt-Loosening Rotation Caused By Vehicle Vibrations

Specifications

• Manufacturer: Proform Parts
• Manufacturer Part Number: 66754
• Bolt Type: Locking Bolt
• Head Type: Hex Head
• Thread Size: 8 Millimeter
• Length (IN): 0.984 Inch
• Finish: Black Oxide
• Color: Black
• Material: Steel
• Washer Type: Wedge Locking

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