Designed to deliver an aggressive, hard-hitting exhaust note at idle, the Thumpr camshaft series from COMP Cams also delivers excellent horsepower gains and a broad torque curve. A perfect choice for muscle cars and street rods, the Thumpr series' early intake valve opening and long exhaust duration create optimum overlap for that race car idle. The Thumpr grinds all require an aftermarket torque converter and lower gear ratio to ensure the drivetrain always puts the engine in its powerband. Additionally, Thumpr camshafts typically deliver reduced vacuum at idle, making a vacuum canister, pump or hydroboost a requirement for vehicles running power brakes.
Catalog
User 1
This Part Fits:
Catalog
User 1
This Part Fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1967-1975 | Chevrolet | Bel Air | Base |
| 1967-1972 | 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 |
| 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 |
| 1992-1993 | Chevrolet | C2500 Suburban | Base |
| 1992-1993 | Chevrolet | C2500 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 |
| 1967,1969,1971-1972 | Chevrolet | Camaro | Base |
| 1967,1969 | Chevrolet | Camaro | RS |
| 1967-1972 | Chevrolet | Camaro | SS |
| 1972 | Chevrolet | Camaro | Z28 |
| 1967-1972 | 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 |
| 1967-1974 | Chevrolet | Corvette | Base |
| 1967-1975 | 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 | Chevrolet | G30 | Beauville |
| 1975-1976 | Chevrolet | G30 | Chevy Van |
| 1975-1976 | Chevrolet | G30 | Hi-Cube |
| 1973-1974 | Chevrolet | G30 Van | Base |
| 1967-1976 | Chevrolet | Impala | Base |
| 1975-1976 | Chevrolet | Impala | Custom |
| 1976 | Chevrolet | Impala | Custom Landau |
| 1976 | Chevrolet | Impala | S |
| 1975-1976 | Chevrolet | Impala | Sport |
| 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 |
| 1976-1978,1980 | 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 |
| 1985 | Chevrolet | K20 Suburban | Scottsdale |
| 1985 | Chevrolet | K20 Suburban | Silverado |
| 1992-1993 | Chevrolet | K2500 Suburban | Base |
| 1992-1993 | Chevrolet | K2500 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 |
| 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 |
| 1966-1967,1973-1974 | 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 |
| 1970-1971,1973-1974 | Chevrolet | P30 Van | Base |
| 1988 | Chevrolet | R30 | Cheyenne |
| 1987-1988 | Chevrolet | R30 | Custom Deluxe |
| 1987-1988 | Chevrolet | R30 | Scottsdale |
| 1987-1988 | Chevrolet | R30 | Silverado |
| 1989 | Chevrolet | R3500 | Cheyenne |
| 1989 | Chevrolet | R3500 | Scottsdale |
| 1989 | Chevrolet | R3500 | Silverado |
| 1969-1972 | Chevrolet | Townsman | Base |
| 1988 | Chevrolet | V30 | Cheyenne |
| 1987-1988 | Chevrolet | V30 | Custom Deluxe |
| 1987-1988 | Chevrolet | V30 | Scottsdale |
| 1987-1988 | Chevrolet | V30 | Silverado |
| 1989 | Chevrolet | V3500 | Cheyenne |
| 1989 | Chevrolet | V3500 | Scottsdale |
| 1989 | Chevrolet | V3500 | Silverado |
| 1972-1979 | Excalibur | Phaeton | Base |
| 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 |
| 1979-1980 | 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 |
| 1975-1978 | GMC | C25 Suburban | Sierra Grande |
| 1968-1974 | GMC | C25/C2500 Pickup | Base |
| 1968-1974 | GMC | C25/C2500 Suburban | Base |
| 1979-1986 | GMC | C2500 | Base |
| 1979-1986 | GMC | C2500 | High Sierra |
| 1979-1986 | GMC | C2500 | Sierra Classic |
| 1979-1982 | GMC | C2500 | Sierra Grande |
| 1979-1986,1992-1993 | GMC | C2500 Suburban | Base |
| 1979-1986 | GMC | C2500 Suburban | High Sierra |
| 1979-1986 | GMC | C2500 Suburban | Sierra Classic |
| 1979-1982 | GMC | C2500 Suburban | Sierra Grande |
| 1992-1993 | GMC | C2500 Suburban | SLE |
| 1975-1978 | GMC | C35 | Base |
| 1975-1978 | GMC | C35 | High Sierra |
| 1975-1978 | GMC | C35 | Sierra Classic |
| 1975-1978 | GMC | C35 | Sierra Grande |
| 1968-1974 | GMC | C35/C3500 Pickup | Base |
| 1979-1986 | GMC | C3500 | Base |
| 1979-1986 | GMC | C3500 | High Sierra |
| 1979-1986 | GMC | C3500 | Sierra Classic |
| 1979-1982 | GMC | C3500 | Sierra Grande |
| 1975-1976 | GMC | G25 | Rally |
| 1975-1976 | GMC | G25 | Rally STX |
| 1976 | GMC | G35 | Magnavan |
| 1974 | GMC | G35/G3500 Van | Base |
| 1973-1974 | GMC | G35/G3500 Van | Rally |
| 1973-1974 | GMC | G35/G3500 Van | Vandura |
| 1973-1974,1976 | GMC | Jimmy | Base |
| 1976 | GMC | Jimmy | High Sierra |