PROFORM / 66754
Part #: 66754
UPC: 037995667543
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Description: 12 Pcs; Fits GM LS Engines with 1/4in Wide Flange
Description:
Description
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.
Information
12 Pcs
Application summary
| Year | Make / model |
|---|---|
| 1997-1999 | Chevrolet C1500 |
| 1997-1999 | Chevrolet C1500 Suburban |
| 1997-1999 | Chevrolet C2500 |
| 1997-1999 | Chevrolet C2500 Suburban |
| 1997-1999 | Chevrolet C35 |
| 1997-1999 | Chevrolet C3500 |
| 1997-1999 | Chevrolet Camaro |
| 1997-1999 | Chevrolet Cargo Van |
| 1997-1999 | Chevrolet Corvette |
| 1997-1999 | Chevrolet Express 1500 |
| 1997-1999 | Chevrolet Express 2500 |
| 1997-1999 | Chevrolet Express 3500 |
| 1997-1999 | Chevrolet K1500 |
| 1997-1999 | Chevrolet K1500 Suburban |
| 1997-1999 | Chevrolet K2500 |
| 1997-1999 | Chevrolet K2500 Suburban |
| 1997-1999 | Chevrolet K3500 |
| 1999 | Chevrolet L30 |
| 1997-1999 | Chevrolet P30 |
| 1997-1999 | Chevrolet Silverado |
| 1999 | Chevrolet Silverado 1500 |
| 1999 | Chevrolet Silverado 2500 |
| 1997-1999 | Chevrolet Suburban 1500 |
| 1997-1999 | Chevrolet Tahoe |
| 1997-1999 | Chevrolet W3500 Tiltmaster |
| 1997-1999 | Chevrolet W4500 Tiltmaster |
Specifications
- GTIN
- 00037995667543
- Weight
- 0.65 lb
- Height
- 1.75 in
- Length
- 6.75 in
- Width
- 4.5 in
- EO
- Legal US
- Life cycle
- Available to Order
- AAM brand code
- PRF
- Warehouse brand code
- PRF
- AAIA brand code
- BCHW
Attributes
- Applications
- Fits GM LS Engines with 1/4-inch Wide Flange
- California Proposition 65
- No
- Category
- Header Bolts
- Color
- Nickel Plated
- Diameter
- 8mm
- Feature/Benefit
- Backed by a full 30 day limited factory warranty.
- Finish
- Nickel Plated Steel
- Length
- 0.984 inch
- Material
- Steel
- Part Type
- Header Bolts
- Title
- Proform Wedge-Locking Header Bolts; Hex Head; M8 X .984in; Chevy LS; Nickel Plt; 12 Pcs
Fitment status
Select a vehicle or engine to see whether this part applies to your application.
Application summary
1997-1999 Chevrolet C1500; 1997-1999 Chevrolet C1500 Suburban; 1997-1999 Chevrolet C2500; 1997-1999 Chevrolet C2500 Suburban; 1997-1999 Chevrolet C35; 1997-1999 Chevrolet C3500; 1997-1999 Chevrolet Camaro; 1997-1999 Chevrolet Cargo Van; 1997-1999 Chevrolet Corvette; 1997-1999 Chevrolet Express 1500; 1997-1999 Chevrolet Express 2500; 1997-1999 Chevrolet Express 3500; 1997-1999 Chevrolet K1500; 1997-1999 Chevrolet K1500 Suburban; 1997-1999 Chevrolet K2500; 1997-1999 Chevrolet K2500 Suburban; 1997-1999 Chevrolet K3500; 1999 Chevrolet L30; 1997-1999 Chevrolet P30; 1997-1999 Chevrolet Silverado; 1999 Chevrolet Silverado 1500; 1999 Chevrolet Silverado 2500; 1997-1999 Chevrolet Suburban 1500; 1997-1999 Chevrolet Tahoe; 1997-1999 Chevrolet W3500 Tiltmaster; 1997-1999 Chevrolet W4500 Tiltmaster
Resources
PROFORM 66754
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