Machined from 8650 steel with a billet pushrod seat insert, these Ultra Pro Magnum XD rockers can handle up to 1,000 lbs of spring pressure. This 1803 rocker features a 1.65 ratio for use with 3/8" stud Chevrolet V6 and 265-400 Small Block.
| Year |
Make |
Model |
Submodel |
| 1973-1975 |
Buick |
Apollo |
Base |
| 1975 |
Buick |
Apollo |
SR |
| 1972-1973 |
Buick |
Centurion |
Base |
| 1973-1977,1980 |
Buick |
Century |
Base |
| 1975-1979 |
Buick |
Century |
Custom |
| 1980 |
Buick |
Century |
Estate |
| 1976 |
Buick |
Century |
Indianapolis 500 Pace Car |
| 1978-1980 |
Buick |
Century |
Limited |
| 1973-1975 |
Buick |
Century |
Luxus |
| 1978-1979 |
Buick |
Century |
Special |
| 1978 |
Buick |
Century |
Sport |
| 1991-1993 |
Buick |
Commercial Chassis |
Base |
| 1976-1977 |
Buick |
Electra |
225 |
| 1976-1977 |
Buick |
Electra |
Limited |
| 1973 |
Buick |
Estate Wagon |
Base |
| 1972 |
Buick |
GS |
Base |
| 1972-1974,1977-1978 |
Buick |
LeSabre |
Base |
| 1972-1973,1977-1978 |
Buick |
LeSabre |
Custom |
| 1977 |
Buick |
LeSabre |
Custom Sport |
| 1974 |
Buick |
LeSabre |
Luxus |
| 1973-1980 |
Buick |
Regal |
Base |
| 1978-1980 |
Buick |
Regal |
Limited |
| 1976-1977 |
Buick |
Regal |
SR |
| 1992-1993 |
Buick |
Roadmaster |
Base |
| 1991-1993 |
Buick |
Roadmaster |
Estate Wagon |
| 1992-1993 |
Buick |
Roadmaster |
Limited |
| 1972 |
Buick |
Skylark |
350 |
| 1972,1975-1979 |
Buick |
Skylark |
Base |
| 1972,1978-1979 |
Buick |
Skylark |
Custom |
| 1976-1979 |
Buick |
Skylark |
S |
| 1978 |
Buick |
Skylark |
Sport |
| 1975-1977 |
Buick |
Skylark |
SR |
| 1972 |
Buick |
Sportwagon |
Base |
| 1990-1992 |
Cadillac |
Brougham |
Base |
| 1990-1992 |
Cadillac |
Brougham |
d'Elegance |
| 1992-1993 |
Cadillac |
Commercial Chassis |
Brougham |
| 1980 |
Cadillac |
Eldorado |
Base |
| 1980 |
Cadillac |
Eldorado |
Biarritz |
| 1980 |
Cadillac |
Eldorado |
Cabriolet |
| 1993 |
Cadillac |
Fleetwood |
Base |
| 1993 |
Cadillac |
Fleetwood |
Brougham |
| 1980 |
Cadillac |
Seville |
Base |
| 1980 |
Cadillac |
Seville |
Elegante |
| 1975 |
Checker |
Marathon |
Aerobus |
| 1975-1982 |
Checker |
Marathon |
Base |
| 1975-1982 |
Checker |
Marathon |
Deluxe |
| 1955-1975 |
Chevrolet |
Bel Air |
Base |
| 1955-1956 |
Chevrolet |
Bel Air |
Beauville |
| 1955-1957 |
Chevrolet |
Bel Air |
Nomad |
| 1958-1972 |
Chevrolet |
Biscayne |
Base |
| 1960 |
Chevrolet |
Biscayne |
Fleetmaster |
| 1958-1961,1969-1972 |
Chevrolet |
Brookwood |
Base |
| 1967-1980,1988 |
Chevrolet |
Camaro |
Base |
| 1979-1986 |
Chevrolet |
Camaro |
Berlinetta |
| 1985-1990 |
Chevrolet |
Camaro |
Iroc-Z |
| 1973-1978,1987 |
Chevrolet |
Camaro |
LT |
| 1976-1978 |
Chevrolet |
Camaro |
LT Rally Sport |
| 1976-1980 |
Chevrolet |
Camaro |
Rally Sport |
| 1967-1973,1975,1989-1992 |
Chevrolet |
Camaro |
RS |
| 1992 |
Chevrolet |
Camaro |
RS Heritage Edition |
| 1981-1987 |
Chevrolet |
Camaro |
Sport |
| 1967-1972 |
Chevrolet |
Camaro |
SS |
| 1970-1974,1977-1987,1991-1992 |
Chevrolet |
Camaro |
Z28 |
| 1992 |
Chevrolet |
Camaro |
Z28 Heritage Edition |
| 1982 |
Chevrolet |
Camaro |
Z28 Indianapolis 500 Pace Car |
| 1966-1972,1986-1992 |
Chevrolet |
Caprice |
Base |
| 1973-1996 |
Chevrolet |
Caprice |
Classic |
| 1986-1990 |
Chevrolet |
Caprice |
Classic Brougham |
| 1976-1978,1981-1982 |
Chevrolet |
Caprice |
Classic Estate |
| 1976-1981 |
Chevrolet |
Caprice |
Classic Landau |
| 1993-1994 |
Chevrolet |
Caprice |
Classic LS |
| 1987-1990 |
Chevrolet |
Caprice |
Classic LS Brougham |
| 1991-1993 |
Chevrolet |
Caprice |
Classic LTZ |
| 1975-1976,1979-1980 |
Chevrolet |
Caprice |
Classic Sport |
| 1973-1974 |
Chevrolet |
Caprice |
Estate |
| 1975 |
Chevrolet |
Caprice |
Estate Wagon |
| 1967-1968 |
Chevrolet |
Chevelle |
300 |
| 1967-1969 |
Chevrolet |
Chevelle |
300 Deluxe |
| 1964-1968,1970-1972 |
Chevrolet |
Chevelle |
Base |
| 1967-1972 |
Chevrolet |
Chevelle |
Concours |
| 1969-1972 |
Chevrolet |
Chevelle |
Concours Estate |
| 1965-1967,1973 |
Chevrolet |
Chevelle |
Deluxe |
| 1969-1972 |
Chevrolet |
Chevelle |
Greenbrier |
| 1968-1972 |
Chevrolet |
Chevelle |
Malibu |
| 1968-1972 |
Chevrolet |
Chevelle |
Nomad |
| 1964-1972 |
Chevrolet |
Chevelle |
SS |
| 1963-1967 |
Chevrolet |
Chevy II |
Base |
| 1963-1968 |
Chevrolet |
Chevy II |
Nova |
| 1964-1967 |
Chevrolet |
Chevy II |
Nova SS |
| 1988 |
Chevrolet |
Corvette |
35th Anniversary Edition |
| 1955-1972,1974,1977-1982,1984-1991 |
Chevrolet |
Corvette |
Base |
| 1982 |
Chevrolet |
Corvette |
Collector's Edition |
| 1978,1986 |
Chevrolet |
Corvette |
Indianapolis 500 Pace Car |
| 1978 |
Chevrolet |
Corvette |
Silver Anniversary Edition |
| 1975-1976 |
Chevrolet |
Corvette |
Stingray |
| 1958 |
Chevrolet |
Del Ray |
Base |
| 1959-1985 |
Chevrolet |
Impala |
Base |
| 1975-1977 |
Chevrolet |
Impala |
Custom |
| 1976 |
Chevrolet |
Impala |
Custom Landau |
| 1981-1982 |
Chevrolet |
Impala |
Estate |
| 1977-1979 |
Chevrolet |
Impala |
Landau |
| 1976 |
Chevrolet |
Impala |
S |
| 1975-1976,1979-1980 |
Chevrolet |
Impala |
Sport |
| 1964-1967 |
Chevrolet |
Impala |
SS |
| 1969-1972 |
Chevrolet |
Kingswood |
Base |
| 1969-1972 |
Chevrolet |
Kingswood |
Estate |
| 1973-1975 |
Chevrolet |
Laguna |
Base |
| 1973 |
Chevrolet |
Laguna |
Estate |
| 1975-1976 |
Chevrolet |
Laguna |
S3 |
| 1964-1967,1973-1981 |
Chevrolet |
Malibu |
Base |
| 1974-1983 |
Chevrolet |
Malibu |
Classic |
| 1975-1976,1978-1980 |
Chevrolet |
Malibu |
Classic Estate |
| 1976-1981 |
Chevrolet |
Malibu |
Classic Landau |
| 1977,1979-1980 |
Chevrolet |
Malibu |
Classic Sport |
| 1973-1974,1979-1980 |
Chevrolet |
Malibu |
Estate |
| 1976,1979 |
Chevrolet |
Malibu |
Landau |
| 1979 |
Chevrolet |
Malibu |
Police |
| 1977,1979-1980 |
Chevrolet |
Malibu |
Sport |
| 1970-1974,1979,1981-1988 |
Chevrolet |
Monte Carlo |
Base |
| 1983 |
Chevrolet |
Monte Carlo |
CL |
| 1973-1974,1976,1978-1981 |
Chevrolet |
Monte Carlo |
Landau |
| 1986-1988 |
Chevrolet |
Monte Carlo |
LS |
| 1973,1975-1977 |
Chevrolet |
Monte Carlo |
S |
| 1978,1980 |
Chevrolet |
Monte Carlo |
Sport |
| 1983-1988 |
Chevrolet |
Monte Carlo |
SS |
| 1975-1979 |
Chevrolet |
Monza |
2+2 |
| 1978-1979 |
Chevrolet |
Monza |
2+2 Sport |
| 1976-1979 |
Chevrolet |
Monza |
2+2 Spyder |
| 1976,1978-1979 |
Chevrolet |
Monza |
Base |
| 1977 |
Chevrolet |
Monza |
Mirage |
| 1975,1978-1979 |
Chevrolet |
Monza |
S |
| 1978 |
Chevrolet |
Monza |
Sport |
| 1977 |
Chevrolet |
Monza |
Towne Coupe |
| 1977 |
Chevrolet |
Monza |
Towne Coupe Cabriolet |
| 1977 |
Chevrolet |
Monza |
Towne Coupe Sport |
| 1969-1979 |
Chevrolet |
Nova |
Base |
| 1976-1977 |
Chevrolet |
Nova |
Concours |
| 1973-1975,1978-1979 |
Chevrolet |
Nova |
Custom |
| 1975 |
Chevrolet |
Nova |
LN |
| 1975-1978 |
Chevrolet |
Nova |
Police |
| 1977-1979 |
Chevrolet |
Nova |
Rally |
| 1976 |
Chevrolet |
Nova |
SS |
| 1955-1957 |
Chevrolet |
One-Fifty Series |
Base |
| 1969-1972 |
Chevrolet |
Townsman |
Base |
| 1955-1957 |
Chevrolet |
Two-Ten Series |
Base |
| 1955-1957 |
Chevrolet |
Two-Ten Series |
Del Ray |
| 1959 |
Fiat |
1100 |
Base |
| 1972-1973 |
Oldsmobile |
98 |
Base |
| 1973 |
Oldsmobile |
98 |
Regency |
| 1975,1977,1991-1992 |
Oldsmobile |
Custom Cruiser |
Base |
| 1975 |
Oldsmobile |
Custom Cruiser |
Panel |
| 1972-1973,1980 |
Oldsmobile |
Cutlass |
Base |
| 1980 |
Oldsmobile |
Cutlass |
Brougham |
| 1972 |
Oldsmobile |
Cutlass |
Cruiser |
| 1980 |
Oldsmobile |
Cutlass |
LS |
| 1972-1973 |
Oldsmobile |
Cutlass |
S |
| 1978-1979 |
Oldsmobile |
Cutlass |
Vista Cruiser |
| 1979 |
Oldsmobile |
Cutlass |
Vista Cruiser Brougham |
| 1978-1980 |
Oldsmobile |
Cutlass Calais |
Base |
| 1980,1982 |
Oldsmobile |
Cutlass Cruiser |
Base |
| 1980 |
Oldsmobile |
Cutlass Cruiser |
Brougham |
| 1978 |
Oldsmobile |
Cutlass Salon |
442 |
| 1978-1980 |
Oldsmobile |
Cutlass Salon |
Base |
| 1978-1980 |
Oldsmobile |
Cutlass Salon |
Brougham |
| 1972-1973,1978-1980 |
Oldsmobile |
Cutlass Supreme |
Base |
| 1978-1980 |
Oldsmobile |
Cutlass Supreme |
Brougham |
| 1972-1973,1975,1977 |
Oldsmobile |
Delta 88 |
Base |
| 1972-1973,1975,1977 |
Oldsmobile |
Delta 88 |
Royale |
| 1972 |
Oldsmobile |
F85 |
Base |
| 1973,1975-1979 |
Oldsmobile |
Omega |
Base |
| 1976-1979 |
Oldsmobile |
Omega |
Brougham |
| 1978-1979 |
Oldsmobile |
Omega |
Brougham LS |
| 1977 |
Oldsmobile |
Omega |
Deluxe |
| 1976-1977 |
Oldsmobile |
Omega |
F85 |
| 1975 |
Oldsmobile |
Omega |
Salon |
| 1976-1978 |
Oldsmobile |
Omega |
SX |
| 1977-1979 |
Oldsmobile |
Starfire |
Base |
| 1977-1979 |
Oldsmobile |
Starfire |
Firenza |
| 1977-1979 |
Oldsmobile |
Starfire |
GT |
| 1977-1979 |
Oldsmobile |
Starfire |
SX |
| 1972-1973 |
Oldsmobile |
Vista Cruiser |
Base |
| 1974-1975,1983-1986 |
Pontiac |
Bonneville |
Base |
| 1983-1986 |
Pontiac |
Bonneville |
Brougham |
| 1984-1986 |
Pontiac |
Bonneville |
LE |
| 1967,1974-1975 |
Pontiac |
Catalina |
Base |
| 1967,1974-1975 |
Pontiac |
Catalina |
Safari |
| 1967 |
Pontiac |
Catalina |
Ventura |
| 1972-1974,1977-1980,1982-1992 |
Pontiac |
Firebird |
Base |
| 1972-1974,1977-1980 |
Pontiac |
Firebird |
Esprit |
| 1972-1974,1977-1981,1989-1992 |
Pontiac |
Firebird |
Formula |
| 1982-1986 |
Pontiac |
Firebird |
S/E |
| 1972-1974,1980-1992 |
Pontiac |
Firebird |
Trans Am |
| 1989-1992 |
Pontiac |
Firebird |
Trans Am GTA |
| 1974-1975,1978-1980 |
Pontiac |
Grand Am |
Base |
| 1975,1977-1980 |
Pontiac |
Grand LeMans |
Base |
| 1975,1978-1980 |
Pontiac |
Grand LeMans |
Safari |
| 1978-1980,1983-1987 |
Pontiac |
Grand Prix |
Base |
| 1983-1987 |
Pontiac |
Grand Prix |
Brougham |
| 1984-1987 |
Pontiac |
Grand Prix |
LE |
| 1975,1978-1980,1983 |
Pontiac |
Grand Prix |
LJ |
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