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Vehicle Info NeededCOMP CAMSPART NUMBER: 249-GK08-601-8
Mutha Thumpr Retro-Fit Hydraulic Roller Camshaft, Lifters, & Gear Drive Kit Lift: .522"/.509"
$1,19395
Ships on 10/22/2026
Lowest Price Guarantee Chevy 262-400ci Small Block 1987-98 -Factory Roller Block Mutha Thumpr
- Mutha Thumpr Retro-Fit Hydraulic Roller Camshaft, Lifters, & Gear Drive Kit
- Lift: .522"/.509"
- Duration: 291°/311°
- Lobe Separation Angle: 107°
- RPM Range: 2200-5900
- 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
265, 283, 307, 302, 305, 327, 350, 383, 400, 427, L46, L48, L65, LM1, LT-1, L82, L81, LS9, L83, L98, L05, LG3, LG4, LT1, LT4, Camaro, Corvette, Chevelle, Stingray, Silverado, C10, Firebird, Chevrolet, Chevy, Small Block Chevy, Caprice, Malibu, Impala, Nova, 355, GEN1, Monte Carlo, S10
High performance street/strip, needs 9:1 compression, 2500+ stall, intake, gears and headers, 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.
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Part TypeCamshaft Kit
BrandCOMP CAMS
Package Height5.0
Package Width10.5
Package Length26.0
Weight20.0 PG
Part CategoryPerformance Parts
Exh. Duration @ .050 In. (Deg)249
Cam StyleHydraulic roller tappet
Grind Number291THR7
Exh. Duration Advertised (Deg)311
Locks IncludedNo
Engine Make/SizeChevy Small Block (262-400)
Retainers IncludedNo
Intake Valve Lift With Factory Rocker Arm Ratio (I0.522
Int. Duration @ .050 In. (Deg)235
Assembly Lubricant IncludedYes
Basic Operating Rpm Range2,200-5,900
Pushrods IncludedNo
Gaskets IncludedNo
Rocker Arms IncludedNo
Intake Valve Lift0.522 in (13.259 mm)
Computer-Controlled CompatibleNo
Int. Duration Advertised (Deg)291
Lobe Separation (Deg)107
Rpm Range1900-5600
Lifter StyleHydraulic roller
Advertised Duration291 int./311 exh.
Exhaust Valve Lift With Factory Rocker Arm Ratio (0.509
Valve Springs IncludedNo
UsageStreet/Strip
Valve Lift With Factory Rocker Arm Ratio0.522 int./0.509 exh.
Camshaft Gear Attachment3-bolt
QuantitySold as a kit
Valve Stem Seals IncludedNo
Exhaust Valve Lift0.509 in (12.929 mm)
Advertised Intake Duration291
Intake Duration At 050 Inch Lift235
Exhaust Duration At 050 Inch Lift249
Timing Chain StyleGears
Timing Chain And Gears IncludedYes
Advertised Exhaust Duration311
Lifter TypeHydraulic Roller Retrofit
Part FitmentSemi Universal
Duration At 050 Inch Lift235 int./249 exh.
Valve Springs RequiredYes
Lifters IncludedYes
Vendor Part NumberGK08-601-8
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
