Fits GM LS Engines with 3/8" Wide Flange
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.
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.
- Wedge-Locking Technology Eliminates Constantly Re-Tightening Exhaust Collector Bolts, Blocks Bolt-Loosening Rotation caused by Vehicle Vibrations
- Grade 8 (12.9) Steel
- Hex Head Type
- Nickle Finish
- M8 Diameter
- 1.181 Length
- Fits GM LS Engines with 3/8-inch Wide Flange
- Sold as One Set of 12 Pieces
Information:
Wedge-Locking Header Bolts; Hex Head; M8 X 1.181in; Chevy LS; Nickel Plt; 12 PcsApplication Summary:
| Year | Make/Model |
|---|---|
| 2009 | Chevrolet Avalanche |
| 1997-1999 | Chevrolet C1500 |
| 1997-1999 | Chevrolet C1500 Suburban |
| 1997-2000 | Chevrolet C2500 |
| 1997-1999 | Chevrolet C2500 Suburban |
| 1997-2000 | Chevrolet C35 |
| 1997-2000 | Chevrolet C3500 |
| 1997-2000 | Chevrolet Camaro |
| 1997-2000 | Chevrolet Cargo Van |
| 2009 | Chevrolet Cheyenne |
| 2009 | Chevrolet Colorado |
| 1997-2000 | Chevrolet Corvette |
| 2009 | Chevrolet Corvette |
| 1997-2000 | Chevrolet Express 1500 |
| 2009 | Chevrolet Express 1500 |
| 1997-2000 | Chevrolet Express 2500 |
| 2009 | Chevrolet Express 2500 |
| 1997-2000 | Chevrolet Express 3500 |
| 2009 | Chevrolet Express 3500 |
| 2009 | Chevrolet Express 4500 |
| 2009 | Chevrolet Express Cargo |
| 2009 | Chevrolet Express Pasajeros |
| 2009 | Chevrolet Impala |
| 1997-1999 | Chevrolet K1500 |
| 1997-1999 | Chevrolet K1500 Suburban |
| 1997-2000 | Chevrolet K2500 |
| 1997-1999 | Chevrolet K2500 Suburban |
| 1997-2000 | Chevrolet K3500 |
| 1999-2000 | Chevrolet L30 |
| 1997-2000 | Chevrolet P30 |
| 1997-1999 | Chevrolet Silverado |
| 1999-2000 | Chevrolet Silverado 1500 |
| 2009 | Chevrolet Silverado 1500 |
| 1999-2000 | Chevrolet Silverado 2500 |
| 2009 | Chevrolet Silverado 2500 |
| 2009 | Chevrolet Silverado 2500 HD |
| 2009 | Chevrolet Silverado 3500 |
| 2009 | Chevrolet Silverado 3500 HD |
| 2000 | Chevrolet Sonora |
| 1997-2000 | Chevrolet Suburban 1500 |
| 2009 | Chevrolet Suburban 1500 |
| 2000 | Chevrolet Suburban 2500 |
| 2009 | Chevrolet Suburban 2500 |
| 1997-2000 | Chevrolet Tahoe |
| 2009 | Chevrolet Tahoe |
| 2009 | Chevrolet Trailblazer |
| 1997-2000 | Chevrolet W3500 Tiltmaster |
| 2009 | Chevrolet W3500 Tiltmaster |
| 1997-2000 | Chevrolet W4500 Tiltmaster |
| 2009 | Chevrolet W4500 Tiltmaster |
| Attributes | |
| Applications | Fits GM LS Engines with 3/8-inch Wide Flange |
| California Proposition 65 | No |
| Category | Header Bolts |
| Color | Nickel Plated |
| Country of Origin (Primary) | TW |
| Diameter | 8mm |
| Emission Code | Legal US |
| Feature/Benefit | Reusable, Wedge-Locking Technology, Easy to use, No special clips or adhesives needed, Backed by a full 30 day limited factory warranty, Wedge-Locking Technology Eliminates Constantly Re-Tightening Exhaust Collector Bolts; Blocks Bolt-Loosening Rotation caused by Vehicle Vibrations. |
| Finish | Shiny Nickel Plated Steel, Nickel Plated |
| GTIN | 00037995667550 |
| Harmonized Tariff Code (Schedule B) | 7318159000 |
| Hazardous Material Code | N |
| Length | 1.181 inch |
| Life Cycle Status Code | Available to Order |
| Material | Steel |
| NAFTA Preference Criterion Code | B |
| Part Type | Header Bolts |
| SDR Required Flag | N |
| Warranty Time | 1 |
PROFORM 66755 Wedge-Locking Header Bolts; Hex Head; M8 X 1.181in; Chevy LS; Nickel Plt; 12 Pcs
Product Information
- Brand: PROFORM
- Product Number: 66755
- Availability: Call for Availability