The HP shim technology increases clampload around the combustion chamber, thereby increasing the sealability of the head gasket around the open deck block.

This Part Fits:

Year	Make	Model	Submodel
1965-1975	Chevrolet	Bel Air	Base
1965-1972	Chevrolet	Biscayne	Base
1973-1974	Chevrolet	Blazer	Base
1969-1972	Chevrolet	Brookwood	Base
1978-1980	Chevrolet	C10	Big Ten
1975-1980	Chevrolet	C10	Cheyenne
1975-1980	Chevrolet	C10	Custom Deluxe
1975-1980	Chevrolet	C10	Scottsdale
1975-1980	Chevrolet	C10	Silverado
1968-1974	Chevrolet	C10 Pickup	Base
1968-1974	Chevrolet	C10 Suburban	Base
1975-1980	Chevrolet	C10 Suburban	Custom Deluxe
1975-1980	Chevrolet	C10 Suburban	Scottsdale
1975-1980	Chevrolet	C10 Suburban	Silverado
1990	Chevrolet	C1500	454 SS
1990	Chevrolet	C1500	Cheyenne
1990	Chevrolet	C1500	Scottsdale
1990	Chevrolet	C1500	Silverado
1990	Chevrolet	C1500	WT
1975-1981	Chevrolet	C20	Cheyenne
1981-1986	Chevrolet	C20	Custom
1975-1980	Chevrolet	C20	Custom Deluxe
1981	Chevrolet	C20	Deluxe
1975-1986	Chevrolet	C20	Scottsdale
1975-1986	Chevrolet	C20	Silverado
1968-1974	Chevrolet	C20 Pickup	Base
1968-1974	Chevrolet	C20 Suburban	Base
1981-1986	Chevrolet	C20 Suburban	Custom
1975-1980	Chevrolet	C20 Suburban	Custom Deluxe
1981	Chevrolet	C20 Suburban	Deluxe
1975-1980,1982,1984-1986	Chevrolet	C20 Suburban	Scottsdale
1975-1977,1979-1980,1982-1986	Chevrolet	C20 Suburban	Silverado
1975-1981	Chevrolet	C30	Cheyenne
1981-1986	Chevrolet	C30	Custom
1975-1980	Chevrolet	C30	Custom Deluxe
1981	Chevrolet	C30	Deluxe
1975-1986	Chevrolet	C30	Scottsdale
1975-1986	Chevrolet	C30	Silverado
1968-1974	Chevrolet	C30 Pickup	Base
1988-1990	Chevrolet	C3500	Cheyenne
1988-1990	Chevrolet	C3500	Scottsdale
1988-1990	Chevrolet	C3500	Silverado
1967,1969,1971-1972	Chevrolet	Camaro	Base
1967,1969	Chevrolet	Camaro	RS
1967-1972	Chevrolet	Camaro	SS
1972	Chevrolet	Camaro	Z28
1966-1972	Chevrolet	Caprice	Base
1973-1976	Chevrolet	Caprice	Classic
1976	Chevrolet	Caprice	Classic Estate
1976	Chevrolet	Caprice	Classic Landau
1975-1976	Chevrolet	Caprice	Classic Sport
1973-1974	Chevrolet	Caprice	Estate
1975	Chevrolet	Caprice	Estate Wagon
1968	Chevrolet	Chevelle	300
1968-1969	Chevrolet	Chevelle	300 Deluxe
1965-1967,1970-1972	Chevrolet	Chevelle	Base
1967-1972	Chevrolet	Chevelle	Concours
1969-1972	Chevrolet	Chevelle	Concours Estate
1967,1973	Chevrolet	Chevelle	Deluxe
1969-1972	Chevrolet	Chevelle	Greenbrier
1968-1972	Chevrolet	Chevelle	Malibu
1968-1972	Chevrolet	Chevelle	Nomad
1965-1972	Chevrolet	Chevelle	SS
1968	Chevrolet	Chevy II	Nova
1965-1974	Chevrolet	Corvette	Base
1966-1975	Chevrolet	El Camino	Base
1968-1974	Chevrolet	El Camino	Custom
1968-1974	Chevrolet	El Camino	SS
1969-1970	Chevrolet	Estate	Base
1973-1974	Chevrolet	G10 Van	Base
1976	Chevrolet	G20	Beauville
1976	Chevrolet	G20	Chevy Van
1973-1974	Chevrolet	G20 Van	Base
1973-1974	Chevrolet	G20 Van	Sportvan
1975-1976,1988-1990	Chevrolet	G30	Beauville
1975-1976,1988-1990	Chevrolet	G30	Chevy Van
1975-1976,1988-1990	Chevrolet	G30	Hi-Cube
1988-1990	Chevrolet	G30	Sportvan
1973-1974	Chevrolet	G30 Van	Base
1965-1976	Chevrolet	Impala	Base
1975-1976	Chevrolet	Impala	Custom
1976	Chevrolet	Impala	Custom Landau
1976	Chevrolet	Impala	S
1975-1976	Chevrolet	Impala	Sport
1965-1967	Chevrolet	Impala	SS
1976,1979-1980	Chevrolet	K10	Cheyenne
1976,1979-1980	Chevrolet	K10	Custom Deluxe
1976,1979-1980	Chevrolet	K10	Scottsdale
1976,1979-1980	Chevrolet	K10	Silverado
1968-1974	Chevrolet	K10 Pickup	Base
1968-1974	Chevrolet	K10 Suburban	Base
1976,1979-1980	Chevrolet	K10 Suburban	Custom Deluxe
1976,1979-1980	Chevrolet	K10 Suburban	Scottsdale
1976,1979-1980	Chevrolet	K10 Suburban	Silverado
1976-1978,1980	Chevrolet	K20	Cheyenne
1976-1978,1980	Chevrolet	K20	Custom Deluxe
1976-1978,1980	Chevrolet	K20	Scottsdale
1976-1978,1980	Chevrolet	K20	Silverado
1968-1974	Chevrolet	K20 Pickup	Base
1968-1974	Chevrolet	K20 Suburban	Base
1985	Chevrolet	K20 Suburban	Custom
1976-1978,1980	Chevrolet	K20 Suburban	Custom Deluxe
1976-1978,1980,1985	Chevrolet	K20 Suburban	Scottsdale
1976-1977,1980,1985	Chevrolet	K20 Suburban	Silverado
1977,1980-1981	Chevrolet	K30	Cheyenne
1981-1986	Chevrolet	K30	Custom
1977,1980	Chevrolet	K30	Custom Deluxe
1981	Chevrolet	K30	Deluxe
1977,1980-1986	Chevrolet	K30	Scottsdale
1977,1980-1986	Chevrolet	K30	Silverado
1968-1974	Chevrolet	K30 Pickup	Base
1988-1990	Chevrolet	K3500	Cheyenne
1988-1990	Chevrolet	K3500	Scottsdale
1988-1990	Chevrolet	K3500	Silverado
1976	Chevrolet	K5 Blazer	Base
1976-1978	Chevrolet	K5 Blazer	Cheyenne
1977-1978	Chevrolet	K5 Blazer	Custom Deluxe
1978	Chevrolet	K5 Blazer	Silverado
1969-1972	Chevrolet	Kingswood	Base
1969-1972	Chevrolet	Kingswood	Estate
1973-1975	Chevrolet	Laguna	Base
1973	Chevrolet	Laguna	Estate
1975	Chevrolet	Laguna	S3
1974	Chevrolet	Laguna	Type S-3
1965-1967,1973-1974	Chevrolet	Malibu	Base
1974-1975	Chevrolet	Malibu	Classic
1973-1974	Chevrolet	Malibu	Estate
1970-1974	Chevrolet	Monte Carlo	Base
1973-1974	Chevrolet	Monte Carlo	Landau
1973,1975	Chevrolet	Monte Carlo	S
1969-1972	Chevrolet	Nova	Base
1973	Chevrolet	P10 Van	Base
1976,1979	Chevrolet	P20	Base
1976,1979	Chevrolet	P20	Step-Van
1970-1971,1973	Chevrolet	P20 Van	Base
1975-1989	Chevrolet	P30	Base
1975-1985,1987-1989	Chevrolet	P30	Step-Van
1970-1974	Chevrolet	P30 Van	Base
1988	Chevrolet	R20	Cheyenne
1987-1988	Chevrolet	R20	Custom Deluxe
1987-1988	Chevrolet	R20	Scottsdale
1987-1988	Chevrolet	R20	Silverado
1987	Chevrolet	R20 Suburban	Custom Deluxe
1987-1988	Chevrolet	R20 Suburban	Scottsdale
1987-1988	Chevrolet	R20 Suburban	Silverado
1989	Chevrolet	R2500	Cheyenne
1989	Chevrolet	R2500	Scottsdale
1989	Chevrolet	R2500	Silverado
1989-1990	Chevrolet	R2500 Suburban	Scottsdale
1989-1990	Chevrolet	R2500 Suburban	Silverado
1988	Chevrolet	R30	Cheyenne
1987-1988	Chevrolet	R30	Custom Deluxe
1987-1988	Chevrolet	R30	Scottsdale
1987-1988	Chevrolet	R30	Silverado
1989-1990	Chevrolet	R3500	Cheyenne
1989-1990	Chevrolet	R3500	Scottsdale
1989-1990	Chevrolet	R3500	Silverado
1969-1972	Chevrolet	Townsman	Base
1987	Chevrolet	V20 Suburban	Custom Deluxe
1987-1988	Chevrolet	V20 Suburban	Scottsdale
1987-1988	Chevrolet	V20 Suburban	Silverado
1990	Chevrolet	V2500 Suburban	Scottsdale
1990	Chevrolet	V2500 Suburban	Silverado
1988	Chevrolet	V30	Cheyenne
1987-1988	Chevrolet	V30	Custom Deluxe
1987-1988	Chevrolet	V30	Scottsdale
1987-1988	Chevrolet	V30	Silverado
1989-1990	Chevrolet	V3500	Cheyenne
1989-1990	Chevrolet	V3500	Scottsdale
1989-1990	Chevrolet	V3500	Silverado
1975-1978	GMC	C15	Base
1977-1978	GMC	C15	Heavy Half
1975-1978	GMC	C15	High Sierra
1977	GMC	C15	Indy Hauler
1975-1978	GMC	C15	Sierra Classic
1975-1978	GMC	C15	Sierra Grande
1978	GMC	C15	Street Coupe
1975-1978	GMC	C15 Suburban	Base
1975-1978	GMC	C15 Suburban	High Sierra
1975-1978	GMC	C15 Suburban	Sierra Classic
1975-1978	GMC	C15 Suburban	Sierra Grande
1968-1974	GMC	C15/C1500 Pickup	Base
1968-1974	GMC	C15/C1500 Suburban	Base
1979-1980	GMC	C1500	Base
1979-1980	GMC	C1500	Heavy Half
1979-1980	GMC	C1500	High Sierra
1979	GMC	C1500	Sierra Classic
1979-1980	GMC	C1500	Sierra Grande
1979-1980	GMC	C1500	Street Coupe
1979-1980	GMC	C1500 Suburban	Base
1979-1980	GMC	C1500 Suburban	High Sierra
1979-1980	GMC	C1500 Suburban	Sierra Classic
1979-1980	GMC	C1500 Suburban	Sierra Grande
1975-1978	GMC	C25	Base
1975-1978	GMC	C25	High Sierra
1975-1978	GMC	C25	Sierra Classic
1975-1978	GMC	C25	Sierra Grande
1975-1978	GMC	C25 Suburban	Base
1975-1978	GMC	C25 Suburban	High Sierra
1975-1978	GMC	C25 Suburban	Sierra Classic