12 Pcs

Each PROFORM 12.9 Steel (equiv. Grade 8+) Header Bolt is permanently assembled with a pair of special washers. When the bolt is torqued to 28+ ft-lbs, the washers super-hardened external teeth bite into and grip the bottom of the bolt head and the top surface of the header. After being self-locked in this manner, any bolt-loosening rotation is blocked by a wedge-locking action created by the washers interfacing, matching cams. It's an uphill climb: vibration that might ordinarily loosen the bolt actually increases the wedge-locking tension, securing the bolt even more. Because this simple wedge-locking method uses tension instead of friction, contact with oil actually facilitates the wedge effect. When changing headers, PROFORM Header Bolts can be untightened with a normal wrench, lubricated, and reused.

Attributes:

• Brand Name: Proform
• GTIN: 00037995667543
• Applications: Fits GM LS Engines with 1/4-inch Wide Flange
• Color: Nickel Plated
• Diameter: 8mm
• Feature/Benefit: Wedge-Locking Technology Eliminates Constantly Re-Tightening Exhaust Collector Bolts; Blocks Bolt-Loosening Rotation caused by Vehicle Vibrations.
• Finish: Nickel Plated
• Length: 0.984 inch
• Material: Steel
• Part Type: Header Bolts

Extended Information:

• Country of Origin: TW
• Emissions : 1
• Life Cycle Status: Available To Order

Packing Information:

• Quantity of Each: 1
• Package UOM: ST
• Weight: 0 POUNDS