Fits GM BB 396-502 exc 348 and 409, Ford 5.0L, SB 289-302-351W, Mopar 413
PROFORM Wedge-Locking Header Bolts ELIMINATE the need to constantly re-tighten collector bolts, and without the need for clips, pins, racing-wire, chemicals or gunk. The secret is in the Wedge-Locking Washer's super-hardened external teeth that "bite" into the bottom of the bolt head and the top flange surface. Vibrations that normally cause other bolts to loosen, are blocked by the wedge-locking action that uses tension, instead of friction to stay snug. In fact, contact with oil actually facilitates the effect. Installs/uninstalls with a normal wrench, lubricate, and then reuse. Each set comes with sixteen Hex Head, Grade 8 (12.9) steel bolts (3/8"-16 thread, 3/4" long) with a black oxide finish, and pre-assembled Wedge-Locking Washers.
PROFORM Wedge-Locking Header Bolts ELIMINATE the need to constantly re-tighten collector bolts, and without the need for clips, pins, racing-wire, chemicals or gunk. The secret is in the Wedge-Locking Washer's super-hardened external teeth that "bite" into the bottom of the bolt head and the top flange surface. Vibrations that normally cause other bolts to loosen, are blocked by the wedge-locking action that uses tension, instead of friction to stay snug. In fact, contact with oil actually facilitates the effect. Installs/uninstalls with a normal wrench, lubricate, and then reuse. Each set comes with sixteen Hex Head, Grade 8 (12.9) steel bolts (3/8"-16 thread, 3/4" long) with a black oxide finish, and pre-assembled Wedge-Locking Washers.
- Grade 8 (12.9) Steel
- Hex Head Type
- 3/4-inch Length
- Fits GM BB 396-502 exc 348 and 409, Ford 5.0L, SB 289-302-351W, Mopar 413
- 1-inch Stud Length
- Sold as One Set of 16 Pieces
Information:
Wedge-Locking Header BoltsApplication Summary:
| Year | Make/Model |
|---|---|
| 1959 | Chevrolet 3B |
| 1959 | Chevrolet 3C |
| 1959 | Chevrolet 3D |
| 1959 | Chevrolet 3E |
| 1959 | Chevrolet 3F |
| 1959 | Chevrolet 3G |
| 1985-2000 | Chevrolet Astro |
| 1980-1990 | Chevrolet B60 |
| 1958-1975 | Chevrolet Bel Air |
| 1981 | Chevrolet Bel Air |
| 1958-1972 | Chevrolet Biscayne |
| 1969-1974 | Chevrolet Blazer |
| 1987-2000 | Chevrolet Blazer |
| 1958-1961 | Chevrolet Brookwood |
| 1969-1972 | Chevrolet Brookwood |
| 1975-1986 | Chevrolet C10 |
| 1960-1974 | Chevrolet C10 Pickup |
| 1967-1986 | Chevrolet C10 Suburban |
| 1982-1985 | Chevrolet C15 |
| 1988-2000 | Chevrolet C1500 |
| 1992-1999 | Chevrolet C1500 Suburban |
| 1975-1987 | Chevrolet C20 |
| 1960-1974 | Chevrolet C20 Pickup |
| 1967-1986 | Chevrolet C20 Suburban |
| 1988-2000 | Chevrolet C2500 |
| 1992-1999 | Chevrolet C2500 Suburban |
| 1975-1986 | Chevrolet C30 |
| 1960-1974 | Chevrolet C30 Pickup |
| 1983-2000 | Chevrolet C35 |
| 1988-2000 | Chevrolet C3500 |
| 1991-1995 | Chevrolet C3500HD |
| 1960-1962 | Chevrolet C40 |
| 1960-1990 | Chevrolet C50 |
| 1960-1990 | Chevrolet C60 |
| 1979 | Chevrolet C70 |
| 1986 | Chevrolet C70 |
| 1967-2000 | Chevrolet Camaro |
| 1966-1996 | Chevrolet Caprice |
| 1997-2000 | Chevrolet Cargo Van |
| 1982-1985 | Chevrolet Celebrity |
| 1964-1973 | Chevrolet Chevelle |
| 1963-1968 | Chevrolet Chevy II |
| 1991-1994 | Chevrolet Commercial Chassis |
| 1958-1961 | Chevrolet Corvette |
| 1968-1982 | Chevrolet Corvette |
| 1984-2000 | Chevrolet Corvette |
| 1958 | Chevrolet Del Ray |
| 1959-1960 | Chevrolet El Camino |
| 1964-1987 | Chevrolet El Camino |
| 1969-1970 | Chevrolet Estate |
| 1996-2000 | Chevrolet Express 1500 |
| 2009 | Chevrolet Express 1500 |
| 1996-2000 | Chevrolet Express 2500 |
| 1996-2000 | Chevrolet Express 3500 |
| 2009 | Chevrolet Express Cargo |
| 1975-1995 | Chevrolet G10 |
| 1968-1974 | Chevrolet G10 Van |
| 1975-1995 | Chevrolet G20 |
| 1967-1974 | Chevrolet G20 Van |
| 1975-1996 | Chevrolet G30 |
| 1970-1974 | Chevrolet G30 Van |
| 1993-1996 | Chevrolet GP3500 |
| 1958-1985 | Chevrolet Impala |
| 1994-1996 | Chevrolet Impala |
| 1975-1986 | Chevrolet K10 |
| 1960-1974 | Chevrolet K10 Pickup |
| 1967-1986 | Chevrolet K10 Suburban |
| 1988-1999 | Chevrolet K1500 |
| 1992-1999 | Chevrolet K1500 Suburban |
| 1975-1986 | Chevrolet K20 |
| 1967 | Chevrolet K20 Panel |
| Attributes | |
| Applications | Fits GM BB 396-502 exc 348 and 409, Ford 5.0L, SB 289-302-351W, Mopar 413 |
| ASIN | B00BF2Y0EO |
| California Proposition 65 | No |
| Category | Header Bolts |
| Color | Black Oxide |
| Country of Origin (Primary) | TW |
| Diameter | 3/8-in. |
| Emission Code | Legal US |
| Feature/Benefit | 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. |
| Finish | Black Oxide |
| Harmonized Tariff Code (Schedule B) | 7318159000 |
| Hazardous Material Code | N |
| Length | 3/4 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 |
| GTIN | 00037995667529 |