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Vehicle Info NeededCOMP CAMSPART NUMBER: 249-K12-602-4
Big Mutha Thumpr Camshaft Complete Kit Lift .500"/.486" Duration 295/313 RPM Range 2500 to 6400
$73795
More than 10 available
Ships on Sep 14, 2026
Lowest Price GuaranteeChevy 262-400ci Small Block 1958-98
Big Mutha Thumpr Camshaft Complete Kit
Lift .500"/.486"
Duration 295/313
RPM Range 2500 to 6400
Lift .500"/.486"
Duration 295/313
RPM Range 2500 to 6400
- Complete Kit
- 3 Grinds To Fit All Of Your Performance Needs
- Long Exhaust Duration
- Produces A Powerful Hard-Hitting Exhaust Note
- Excellent Horsepower Gains And Broad Torque Curve
- Delivers Real Seat Of The Pants Performance
- Designed For Use w/Latest In ValveTrain Components
- 1 Year Limited Warranty
265, 283, 307, 302, 305, 327, 350, 383, 400, L46, L48, L65, LM1, ZQ3, LT-1(1970-1972), LS9(1969-1986), LT9 (1981-1986), L82, L81, LG3, LG4, Camaro, Corvette, Chevelle, Stingray, Silverado, C10, Firebird, Chevrolet, Chevy, Small Block Chevy, Caprice, Malibu, Impala, Nova, 355, GEN1, Monte Carlo, S10
Street/strip, needs 9.5:1 compression, 2800+ stall, intake, gears and headers, very rough idle.
Emissions Note:
This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.
CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART
Part TypeCamshaft Kit
BrandCOMP CAMS
Package Height5.6
Package Width10.3
Package Length25.3
Weight23.4 PG
Part CategoryPerformance Parts
Exh. Duration @ .050 In. (Deg)257
Cam StyleHydraulic flat tappet
Grind Number295TH7
Exh. Duration Advertised (Deg)313
Locks IncludedYes
Engine Make/SizeChevy Small Block (262-400)
Retainers IncludedYes
Intake Valve Lift With Factory Rocker Arm Ratio (I0.5
Int. Duration @ .050 In. (Deg)243
Assembly Lubricant IncludedYes
Basic Operating Rpm Range2,500-6,400
Pushrods IncludedNo
Gaskets IncludedNo
Rocker Arms IncludedNo
Intake Valve Lift0.5 in (12.7 mm)
Computer-Controlled CompatibleNo
Int. Duration Advertised (Deg)295
Lobe Separation (Deg)107
Rpm Range2500-6400
Lifter StyleHydraulic flat tappet
Advertised Duration295 int./313 exh.
Exhaust Valve Lift With Factory Rocker Arm Ratio (0.486
Valve Springs IncludedYes
UsageStreet/Strip
Valve Lift With Factory Rocker Arm Ratio0.500 int./0.486 exh.
QuantitySold as a kit
Valve Stem Seals IncludedYes
Exhaust Valve Lift0.486 in (12.344 mm)
Advertised Intake Duration295
Intake Duration At 050 Inch Lift243
Exhaust Duration At 050 Inch Lift257
Timing Chain StyleDouble roller
Timing Chain And Gears IncludedYes
Advertised Exhaust Duration313
Lifter TypeHydraulic Flat Tappet
Duration At 050 Inch Lift243 int./257 exh.
Valve Springs RequiredNo
Lifters IncludedYes
Vendor Part NumberK12-602-4
Package Qty1
Package TypeEA
No Questions
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Some parts are not legal for use in California or other states with similar laws / regulations
