PROFORM 66753 Wedge-Locking Header Bolts; Hex Head; 3/8 dia. X 1in Black Oxide ; 12 Pcs

Engine Header Bolts; Wedge-Locking Technology; Hex Head Type; 3/8-16 Thread X 1 Inch Long; Black Oxide Finish; 12 Pcs in kit; Fits GM V6, SB 265-400, Buick, Olds, Pontiac 79 and earlier, Mopar BB 383-440 exc 413, AMC V8's w 3/8in bolts

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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 twelve Hex Head, Grade 8 (12.9) steel bolts (3/8-16 thread, 1 long) with a black oxide finish, and pre-assembled Wedge-Locking Washers.

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Application Summary:

Year	Make/Model
1959	Chevrolet 3B
1959	Chevrolet 3C
1959	Chevrolet 3D
1959	Chevrolet 3E
1959	Chevrolet 3F
1959	Chevrolet 3G
1985-2005	Chevrolet Astro
1955-1975	Chevrolet Bel Air
1981	Chevrolet Bel Air
1958-1972	Chevrolet Biscayne
1969-1974	Chevrolet Blazer
1987-2005	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
1988-2002	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
1960-1962	Chevrolet C40
1967-2002	Chevrolet Camaro
1966-1996	Chevrolet Caprice
1997-2000	Chevrolet Cargo Van
2003-2004	Chevrolet Cargo Van
1982-1985	Chevrolet Celebrity
1964-1973	Chevrolet Chevelle
1963-1968	Chevrolet Chevy II
1991-1994	Chevrolet Commercial Chassis
1955-1961	Chevrolet Corvette
1968-1982	Chevrolet Corvette
1984-2004	Chevrolet Corvette
1957-1958	Chevrolet Del Ray
1959-1960	Chevrolet El Camino
1964-1987	Chevrolet El Camino
1969-1970	Chevrolet Estate
1996-2014	Chevrolet Express 1500
1996-2006	Chevrolet Express 2500
2018-2022	Chevrolet Express 2500
1996-2002	Chevrolet Express 3500
2018-2022	Chevrolet Express 3500
2009-2014	Chevrolet Express Cargo
2018-2021	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
2001-2002	Chevrolet G30
1970-1974	Chevrolet G30 Van
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
1960-1974	Chevrolet K20 Pickup