Competition Cams 12-602-20 Nitrided Big Mutha Thumpr Camshaft

Street/strip, needs 9.5:1 compression, 2800+ stall, intake, gears and headers, very rough idle. Nitrided.

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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.

• Pro Plasma Nitriding Service In House
• Nitrogen Is Introduced Into Iron Or Steel
• Causing Surface Hardness
• Improved Initial/Long Term Wear Characteristics
• Nitriding Has Been Race Proven
• 1 Year Limited Warranty

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Application Summary:

Year	Make/Model
1995-1996	AM General Hummer
1965-1985	Avanti II
1987-1991	Avanti II
1965-1969	Bizzarrini GT America
1973-1974	Buick Apollo
1973	Buick Centurion
1973-1974	Buick Century
1977-1981	Buick Century
1991-1996	Buick Commercial Chassis
1970	Buick Estate Wagon
1973	Buick Estate Wagon
1970-1972	Buick GS
1968-1969	Buick GS 350
1968-1974	Buick LeSabre
1978	Buick LeSabre
1973-1974	Buick Regal
1977-1980	Buick Regal
1982-1987	Buick Regal
1991-1996	Buick Roadmaster
1968-1972	Buick Skylark
1977-1979	Buick Skylark
1968-1969	Buick Special
1968-1972	Buick Sportwagon
1990-1992	Cadillac Brougham
1992-1996	Cadillac Commercial Chassis
1993-1996	Cadillac Fleetwood
1966-1974	Checker Aerobus
1969-1970	Checker Deluxe
1965-1982	Checker Marathon
1969-1974	Checker Taxicab
1959	Chevrolet 3B
1959	Chevrolet 3C
1959	Chevrolet 3D
1959	Chevrolet 3E
1959	Chevrolet 3F
1959	Chevrolet 3G
1955-1975	Chevrolet Bel Air
1981	Chevrolet Bel Air
1958-1972	Chevrolet Biscayne
1969-1974	Chevrolet Blazer
1987-1994	Chevrolet Blazer
1959-1961	Chevrolet Brookwood
1969-1972	Chevrolet Brookwood
1975-1986	Chevrolet C10
1960-1974	Chevrolet C10 Pickup
1967-1986	Chevrolet C10 Suburban
1982-1985	Chevrolet C15
1988-1995	Chevrolet C1500
1992-1995	Chevrolet C1500 Suburban
1975-1987	Chevrolet C20
1960-1974	Chevrolet C20 Pickup
1967-1986	Chevrolet C20 Suburban
1988-1995	Chevrolet C2500
1992-1995	Chevrolet C2500 Suburban
1975-1986	Chevrolet C30
1960-1974	Chevrolet C30 Pickup
1983-1994	Chevrolet C35
1988-1995	Chevrolet C3500
1960-1962	Chevrolet C40
1967-1986	Chevrolet Camaro
1966-1996	Chevrolet Caprice
1964-1973	Chevrolet Chevelle
1963-1968	Chevrolet Chevy II
1991-1994	Chevrolet Commercial Chassis
1955-1982	Chevrolet Corvette
1984-1986	Chevrolet Corvette
1957-1958	Chevrolet Del Ray
1959-1960	Chevrolet El Camino
1964-1987	Chevrolet El Camino
1969-1970	Chevrolet Estate
1996	Chevrolet Express 2500
1975-1995	Chevrolet G10
1970-1974	Chevrolet G10 Van

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