# COMP Cams Camshaft CB 291T HR-107 MT Th 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. 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 1970-1972 Chevrolet Chevelle Base 1968-1972 Chevrolet Chevelle Concours 1969-1972 Chevrolet Chevelle Concours Estate 1973 Chevrolet Chevelle Deluxe 1969-1972 Chevrolet Chevelle Greenbrier 1973 Chevrolet Chevelle Laguna 1973 Chevrolet Chevelle Laguna Estate 1974-1975 Chevrolet Chevelle Laguna Type S-3 1967-1974 Chevrolet Chevelle Malibu 1974-1975 Chevrolet Chevelle Malibu Classic 1974 Chevrolet Chevelle Malibu Classic Estate 1973 Chevrolet Chevelle Malibu Estate 1968-1972 Chevrolet Chevelle Nomad 1971-1972 Chevrolet Chevelle SS 1967-1970 Chevrolet Chevelle SS 396 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 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 1989 Chevrolet R2500 Cheyenne 1989 Chevrolet R2500 Scottsdale 1989 Chevrolet R2500 Silverado 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 1979-1986,1992-1996 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 1992-1996 GMC C2500 Suburban SLE 1995-1996 GMC C2500 Suburban SLT 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 ## Details - **Price:** 758.96 CAD - **Vendor:** COMP Cams - **Type:** Camshafts ## Variants | Variant | Price | Available | |---------|-------|-----------| | Default Title | 758.96 CAD | In stock | ## Images - Photo - Primary - Photo - Primary - Photo - Primary - Logo Image - Logo Image --- > Source: [Standard Auto Part](https://www.standardautopart.com/products/comp-cams-camshaft-cb-291t-hr-107-mt-th) > Updated: 2026-06-26