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COMP Cams 12-602-4

Big Mutha" Thumpr Hydraulic Flat Tappet Camshaft Lift .500"/.486" Duration 295/313 RPM Range 2500 to 6400

COMP Cams 12-602-4

249-12-602-4

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COMP Cams 12-602-4 Big Mutha" Thumpr Hydraulic Flat Tappet Camshaft Lift .500"/.486" Duration 295/313 RPM Range 2500 to 6400 $141.99
Big Mutha' Thumpr Hydraulic Flat Tappet Camshaft
Lift .500"/.486"
Duration 295/313
RPM Range 2500 to 6400

COMP Cams 12-602-4 Details

Chevy 262-400ci Small Block 1958-98

  • 3 Grinds To Fit All Of Your Performance Needs
  • Unique Design
  • Maximizes Sound And Mid To High RPM Power
  • Ensures Safe Piston-To-Valve Clearance
  • Proven To Generate 25+ RWHP Gains
  • Does Not Compromise Durability
  • 1 Year Limited Warranty

  • Specifications:

    Exhaust Valve Lift (in.)
    0.486
    Intake Valve Lift (in.)
    0.500
    Int. Duration @ .050 in. (Deg)
    243
    Exh. Duration @ .050 in. (Deg)
    257
    Int. Duration Advertised (Deg)
    295
    Exh. Duration Advertised (Deg)
    313
    Engine Make/Size
    Chevy Small Block (262-400)
    Lifter Type
    Hydraulic Flat Tappet
    RPM Range
    2500-6400
    Usage
    Street/Strip
    Advertised Duration
    295 int./313 exh.
    Advertised Exhaust Duration
    313
    Advertised Intake Duration
    295
    Basic Operating RPM Range
    2,500-6,400
    Cam Style
    Hydraulic flat tappet
    Computer-Controlled Compatible
    No
    Duration at 050 inch Lift
    243 int./257 exh.
    Exhaust Duration at 050 inch Lift
    257
    Exhaust Valve Lift with Factory Rocker Arm Ratio (
    0.486
    Grind Number
    295TH7
    Intake Duration at 050 inch Lift
    243
    Intake Valve Lift with Factory Rocker Arm Ratio (i
    0.5
    Quantity
    Sold individually
    Valve Lift with Factory Rocker Arm Ratio
    0.500 int./0.486 exh.
    Valve Springs Required
    Yes
    Lobe Separation (Deg)
    107
    Manufacturer's Part Number:
    12-602-4

    Thumpr Camshafts are the hottest cams to hit the streets in more than a decade. That's because they give you the big cam sound you're looking for, without the drawbacks. Applying a camshaft design originally created for sports car endurance racing, they incorporate early exhaust valve opening, long exhaust duration, and a generous amount of intake and exhaust overlap. Best of all, Thumprs will not negatively impact power output or streetability.

    Features:
  • Three unique cam designs for each application that deliver excellent horsepower gains and broad torque curve; perfect choice for muscle cars and street rods
  • Early intake valve opening and long exhaust duration create optimum overlap for powerful, hard-hitting exhaust note
  • Best with aftermarket converters and more rear gear


    Thumpr Sound ClipClick to Listen

    Camshaft & Lifter Kits are indicated by a CL in their part number and include Camshaft, Lifters, Assembly Lube, Decals, and Instructions.

    Complete Kits are indicated by a K in their part number and include Camshaft, Lifters, Timing Chain & Gears, Valve Springs, Retainers, Locks, Assembly Lube, Decals, and Instructions.

  • Does COMP Cams 12-602-4 fit your vehicle?

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    1978 CHEVROLET MALIBU

    • EngineType: ALL
    • SubModel: CLASSIC ESTATE

    1977-1978 CHEVROLET CAMARO

    • Liter: 5.7
    • SubModel: LT RALLY SPORT
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1968 CHEVROLET C20 PICKUP

    • Liter: 5.4
    • SubModel: BASE
    • CUI: 327
    • EngineType: V8 ( 5.4 L / 327 )

    1968 CHEVROLET K20 SUBURBAN

    • Liter: 5.4
    • SubModel: BASE
    • CUI: 327
    • EngineType: V8 ( 5.4 L / 327 )

    1977-1979 CHEVROLET C10 PICKUP

    • CC: 5031
    • Liter: 5.0
    • SubModel: SILVERADO
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1976 GMC C1500 PICKUP

    • Liter: 6.6
    • SubModel: SIERRA CLASSIC
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1978-1981 CHEVROLET G20 VAN

    • Liter: 5.7
    • SubModel: NOMAD
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1980 CHEVROLET CORVETTE

    • CC: 5031
    • Liter: 5.0
    • SubModel: BASE
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1980 CHEVROLET C20 SUBURBAN

    • Liter: 5.0
    • SubModel: SILVERADO
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1982 GMC K1500 SUBURBAN

    • Liter: 5.0
    • SubModel: SIERRA GRANDE
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1968 CHEVROLET CHEVELLE

    • EngineType: ALL
    • SubModel: BASE

    1975-1980 GMC K1500 PICKUP

    • Liter: 6.6
    • SubModel: BASE
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1978-1980 OLDSMOBILE CUTLASS SALON

    • Liter: 5.0
    • SubModel: BROUGHAM
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1979-1986 GMC K2500 PICKUP

    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1968 GMC K25/K2500 SUBURBAN

    • CC: 5358
    • Liter: 5.3
    • SubModel: BASE
    • CUI: 327
    • EngineType: V8 ( 5.3 L / 327 )

    1982 PONTIAC FIREBIRD

    • Liter: 5.0
    • SubModel: S/E
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1982-1986 CHEVROLET CAMARO

    • CC: 5031
    • Liter: 5.0
    • SubModel: SPORT
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1976 CHEVROLET IMPALA

    • Liter: 6.6
    • SubModel: CUSTOM LANDAU
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1971-1972 GMC G35/G3500 VAN

    • Liter: 5.7
    • SubModel: RALLY
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1981 CHEVROLET K20 SUBURBAN

    • Liter: 5.7
    • SubModel: DELUXE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1983-1986 PONTIAC GRAND PRIX

    • Liter: 5.0
    • SubModel: BROUGHAM
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1981 CHEVROLET CAMARO

    • CC: 5031
    • Liter: 5.0
    • SubModel: SPORT
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1981-1986 CHEVROLET MONTE CARLO

    • CC: 5031
    • Liter: 5.0
    • SubModel: BASE
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1978-1979 CHEVROLET NOVA

    • Liter: 5.7
    • SubModel: CUSTOM
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1975-1981 CHEVROLET K10 PICKUP

    • Liter: 5.7
    • SubModel: CHEYENNE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1981-1986 CHEVROLET G20 VAN

    • CC: 5031
    • Liter: 5.0
    • SubModel: CHEVY VAN
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1968 CHEVROLET CHEVY II

    • Liter: 5.4
    • SubModel: NOVA
    • CUI: 327
    • EngineType: V8 ( 5.4 L / 327 )

    1976 CHEVROLET NOVA

    • EngineType: ALL
    • SubModel: SS

    1981-1986 CHEVROLET BLAZER K5

    • CC: 5031
    • Liter: 5.0
    • SubModel: SILVERADO
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1976-1978 GMC G35/G3500 VAN

    • Liter: 5.7
    • SubModel: RALLY CAMPER SPECIAL
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1968 CHEVROLET BISCAYNE

    • CC: 5031
    • Liter: 5.0
    • SubModel: BASE
    • CUI: 307
    • EngineType: V8 ( 5.0 L / 307 )

    1968 CHEVROLET CHEVELLE

    • CC: 5358
    • Liter: 5.3
    • SubModel: 300 DELUXE
    • CUI: 327
    • EngineType: V8 ( 5.3 L / 327 )

    1977-1980 CHEVROLET K30 PICKUP

    • Liter: 6.6
    • SubModel: SILVERADO
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1968-1971 CHEVROLET CAMARO

    • CC: 5736
    • Liter: 5.7
    • SubModel: SS
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1979 CHEVROLET MALIBU

    • Liter: 5.7
    • SubModel: POLICE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1980 CHEVROLET BLAZER K5

    • Liter: 5.0
    • SubModel: CHEYENNE
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1970 CHEVROLET CHEVELLE

    • CC: 6556
    • Liter: 6.6
    • SubModel: NOMAD
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1975-1978 GMC C25 SUBURBAN

    • Liter: 5.7
    • SubModel: SIERRA CLASSIC
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1979-1980 GMC K1500 SUBURBAN

    • Liter: 6.6
    • SubModel: BASE
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1969-1973 GMC C25/C2500 PICKUP

    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1957 CHEVROLET BEL AIR

    • Liter: 4.6
    • SubModel: NOMAD
    • CUI: 283
    • EngineType: V8 ( 4.6 L / 283 )

    1970-1972 CHEVROLET TOWNSMAN

    • CC: 6556
    • Liter: 6.6
    • SubModel: BASE
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1979-1981 GMC C1500 SUBURBAN

    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1981 CHEVROLET CAMARO

    • Liter: 5.7
    • SubModel: SPORT
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1972 CHEVROLET CHEVELLE

    • CC: 5737
    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1979-1986 GMC K2500 PICKUP

    • Liter: 5.7
    • SubModel: HIGH SIERRA
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1957 CHEVROLET TWO-TEN SERIES

    • CC: 4638
    • Liter: 4.6
    • SubModel: DEL RAY
    • CUI: 283
    • EngineType: V8 ( 4.6 L / 283 )

    1959-1967 CHEVROLET BEL AIR

    • CC: 4638
    • Liter: 4.6
    • SubModel: BASE
    • CUI: 283
    • EngineType: V8 ( 4.6 L / 283 )

    1972 CHEVROLET EL CAMINO

    • Liter: 5.0
    • SubModel: CUSTOM
    • CUI: 307
    • EngineType: V8 ( 5.0 L / 307 )

    1978-1980 GMC CABALLERO

    • Liter: 5.0
    • SubModel: LAREDO
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1985-1986 GMC C2500 SUBURBAN

    • Liter: 5.7
    • SubModel: SIERRA CLASSIC
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1975-1980 CHEVROLET K20 SUBURBAN

    • Liter: 6.6
    • SubModel: CUSTOM DELUXE
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1978 CHEVROLET MONZA

    • CC: 5031
    • Liter: 5.0
    • SubModel: BASE
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1972 CHEVROLET K20 PICKUP

    • CC: 5736
    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1969 CHEVROLET K20 PICKUP

    • CC: 5031
    • Liter: 5.0
    • SubModel: BASE
    • CUI: 307
    • EngineType: V8 ( 5.0 L / 307 )

    1968 GMC C25/C2500 SUBURBAN

    • CC: 5031
    • Liter: 5.0
    • SubModel: BASE
    • CUI: 307
    • EngineType: V8 ( 5.0 L / 307 )

    1985-1986 CHEVROLET MONTE CARLO

    • Liter: 5.0
    • SubModel: SS
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1964-1967 CHEVROLET MALIBU

    • CC: 4638
    • Liter: 4.6
    • SubModel: BASE
    • CUI: 283
    • EngineType: V8 ( 4.6 L / 283 )

    1979 CHEVROLET BLAZER K5

    • Liter: 6.6
    • SubModel: CHEYENNE
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1957-1958 CHEVROLET TRUCK

    • CC: 4638
    • Liter: 4.6
    • SubModel: BASE
    • CUI: 283
    • EngineType: V8 ( 4.6 L / 283 )

    1982-1983 CHEVROLET K20 SUBURBAN

    • Liter: 5.7
    • SubModel: SILVERADO
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1977-1978 GMC C15 SUBURBAN

    • Liter: 5.0
    • SubModel: SIERRA GRANDE
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1976-1980 CHEVROLET C20 PICKUP

    • Liter: 6.6
    • SubModel: CHEYENNE
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1965-1967 CHEVROLET CHEVELLE

    • Liter: 4.6
    • SubModel: DELUXE
    • CUI: 283
    • EngineType: V8 ( 4.6 L / 283 )

    1975-1978 GMC K15 SUBURBAN

    • Liter: 6.6
    • SubModel: HIGH SIERRA
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1968 CHEVROLET K10 PICKUP

    • Liter: 5.4
    • SubModel: BASE
    • CUI: 327
    • EngineType: V8 ( 5.4 L / 327 )

    1982-1986 CHEVROLET K10 SUBURBAN

    • Liter: 5.7
    • SubModel: CUSTOM
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1975-1977 GMC C1500 PICKUP

    • Liter: 5.7
    • SubModel: HIGH SIERRA
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1986 CHEVROLET MONTE CARLO

    • CC: 5031
    • Liter: 5.0
    • SubModel: LS
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1974 CHEVROLET MALIBU

    • CC: 6556
    • Liter: 6.6
    • SubModel: ESTATE
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1982 CHEVROLET K20 SUBURBAN

    • Liter: 5.7
    • SubModel: SCOTTSDALE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1975 CHEVROLET MALIBU

    • Liter: 5.7
    • SubModel: CLASSIC
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1981-1986 GMC C2500 SUBURBAN

    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1978-1980 CHEVROLET C10 SUBURBAN

    • Liter: 5.7
    • SubModel: CUSTOM DELUXE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1973 GMC G25/G2500 VAN

    • Liter: 5.0
    • SubModel: RALLY
    • CUI: 307
    • EngineType: V8 ( 5.0 L / 307 )

    1975-1976 CHEVROLET MONTE CARLO

    • Liter: 5.7
    • SubModel: S
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1968 CHEVROLET CAPRICE

    • CC: 5031
    • Liter: 5.0
    • SubModel: BASE
    • CUI: 307
    • EngineType: V8 ( 5.0 L / 307 )

    1976-1978 GMC G35/G3500 VAN

    • Liter: 5.7
    • SubModel: RALLY
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1980 CHEVROLET CAMARO

    • CC: 5031
    • Liter: 5.0
    • SubModel: BASE
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1972-1974 GMC SPRINT

    • Liter: 5.7
    • SubModel: CUSTOM
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1975 CHEVROLET MONZA

    • Liter: 4.3
    • SubModel: S
    • CUI: 262
    • EngineType: V8 ( 4.3 L / 262 )

    1980 OLDSMOBILE CUTLASS

    • Liter: 5.0
    • SubModel: BASE
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1979 CHEVROLET MALIBU

    • CC: 5031
    • Liter: 5.0
    • SubModel: POLICE
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1974-1976 CHEVROLET EL CAMINO

    • Liter: 6.6
    • SubModel: BASE
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1978-1981 CHEVROLET MONTE CARLO

    • CC: 5031
    • Liter: 5.0
    • SubModel: LANDAU
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1977-1979 CHEVROLET C20 PICKUP

    • CC: 5031
    • Liter: 5.0
    • SubModel: CHEYENNE
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1975-1979 CHEVROLET K10 SUBURBAN

    • Liter: 6.6
    • SubModel: SCOTTSDALE
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1976 GMC G15/G1500 VAN

    • Liter: 6.6
    • SubModel: VANDURA
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1977-1979 CHEVROLET C20 SUBURBAN

    • CC: 5031
    • Liter: 5.0
    • SubModel: CUSTOM DELUXE
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1972 CHEVROLET C20 SUBURBAN

    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1975-1976 CHEVROLET MALIBU

    • Liter: 6.6
    • SubModel: BASE
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1963-1967 CHEVROLET CHEVY II

    • CC: 4638
    • Liter: 4.6
    • SubModel: BASE
    • CUI: 283
    • EngineType: V8 ( 4.6 L / 283 )

    1970-1972 CHEVROLET EL CAMINO

    • CC: 6555
    • Liter: 6.6
    • SubModel: CUSTOM
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1979-1981 CHEVROLET CAMARO

    • Liter: 5.7
    • SubModel: BERLINETTA
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1974-1979 CHEVROLET EL CAMINO

    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1981-1984 GMC K1500 PICKUP

    • Liter: 5.0
    • SubModel: HIGH SIERRA
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1968 CHEVROLET CHEVELLE

    • Liter: 5.4
    • SubModel: MALIBU
    • CUI: 327
    • EngineType: V8 ( 5.4 L / 327 )

    1979-1986 CHEVROLET C30 PICKUP

    • Liter: 5.7
    • SubModel: SILVERADO
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1979-1982 CHEVROLET G30 VAN

    • EngineType: ALL
    • SubModel: SPORTVAN

    1972 CHEVROLET G20 VAN

    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )
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