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Vehicle Info NeededCOMP CAMSPART NUMBER: 249-GK11-602-4
Big Mutha" Thumpr Hydraulic Flat Tappet Camshaft ,Lifter & Gear Drive Kit Lift .522"/.507" Duration 295/312 RPM Range 2300-6200
$72095
Ships on 09/16/2026
Lowest Price GuaranteeChevy 396-454ci Big Block 1965-96
- Big Mutha' Thumpr Hydraulic Flat Tappet Camshaft ,Lifter & Gear Drive Kit
- Camshaft/Lifter/Gear Drive Kit
- Precision Machined
- Heat treated Billet Steel Gears
- 3-Way Crank Sprocket
- 4 deg. Maximum Advance Or Retard
- Ready To Install Kit Incl. Bolts And Lock Plates
- Perfect Addition For Street Performance Vehicles
- 1 Year Limited Warranty
Chevelle, Camaro, Corvette, Stingray, Silverado, C10, Firebird, Chevrolet, Big Block, Chevy, BBC, 454, 427, 502, 396, Caprice, Malibu, Impala, Nova, Monte Carlo, S10, 572
Street/strip, needs 9.5:1 compression, 2800+ stall, intake, gears and headers, very rough idle.
Lift .522"/.507"
Duration 295/312
RPM Range 2300-6200
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.
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Part TypeCamshaft Kit
BrandCOMP CAMS
Package Height5.0
Package Width10.5
Package Length26.0
Weight21.0 PG
Part CategoryPerformance Parts
Exh. Duration @ .050 In. (Deg)243
Cam StyleHydraulic flat tappet
Grind Number295TH7
Exh. Duration Advertised (Deg)295
Locks IncludedNo
Engine Make/SizeChevy Big Block (396-454)
Retainers IncludedNo
Intake Valve Lift With Factory Rocker Arm Ratio (I0.522
Int. Duration @ .050 In. (Deg)257
Assembly Lubricant IncludedYes
Basic Operating Rpm Range2,300-6,200
Pushrods IncludedNo
Gaskets IncludedNo
Rocker Arms IncludedNo
Intake Valve Lift0.522 in (13.259 mm)
Computer-Controlled CompatibleNo
Int. Duration Advertised (Deg)313
Lobe Separation (Deg)107
Rpm Range2300-6200
Lifter StyleHydraulic flat tappet
Advertised Duration295 int./312 exh.
Exhaust Valve Lift With Factory Rocker Arm Ratio (0.507
Valve Springs IncludedNo
UsageStreet/Strip
Valve Lift With Factory Rocker Arm Ratio0.522 int./0.507 exh.
QuantitySold as a kit
Valve Stem Seals IncludedNo
Exhaust Valve Lift0.507 in (12.878 mm)
Advertised Intake Duration295
Intake Duration At 050 Inch Lift243
Exhaust Duration At 050 Inch Lift257
Timing Chain StyleGears
Timing Chain And Gears IncludedYes
Advertised Exhaust Duration312
Lifter TypeHydraulic Flat Tappet
Part FitmentSemi Universal
Duration At 050 Inch Lift243 int./257 exh.
Valve Springs RequiredYes
Lifters IncludedYes
Vendor Part NumberGK11-602-4
Package Qty1
Package TypeEA
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