Each PROFORM 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. Its 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: 00037995667550
- Applications: Fits GM LS Engines with 3/8-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: 1.181 inch
- Material: Steel
- Part Type: Header Bolts
Extended Information:
- Country of Origin:
- Emissions : CARB Eligible
- Life Cycle Status: Available To Order
Packing Information:
- Quantity of Each: 1
- Package UOM: ST
- Dimension: 6.75 x 4.5 x 1.75 inches
- Weight: 1.5 POUNDS