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Vehicle Info NeededCOMP CAMSPART NUMBER: 249-GK11-600-8
Thumpr Retro-Fit Hydraulic Roller Camshaft, Lifters, & Gear Drive Kit Lift: .547"/.530"
$1,56095
Ships on 10/23/2026
Lowest Price Guarantee Chevy 396-454 ci Big Block 1967-96 Non-Factory Roller Block Thumpr
- Thumpr Retro-Fit Hydraulic Roller Camshaft, Lifters, & Gear Drive Kit
- Lift: .547"/.530"
- Duration: 283°/303°
- Lobe Separation Angle: 107°
- RPM Range: 1700-5500
- 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
High performance street, stock converter ok, best with 2000+ converter and gears, choppy/thumping 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 Height5.0
Package Width10.5
Package Length26.0
Weight24.0 PG
Part CategoryPerformance Parts
Exh. Duration @ .050 In. (Deg)241
Cam StyleHydraulic roller tappet
Grind Number283THR7
Exh. Duration Advertised (Deg)303
Locks IncludedNo
Engine Make/SizeChevy Big Block (396-454)
Retainers IncludedNo
Intake Valve Lift With Factory Rocker Arm Ratio (I0.547
Int. Duration @ .050 In. (Deg)227
Assembly Lubricant IncludedYes
Basic Operating Rpm Range1,700-5,700
Pushrods IncludedNo
Gaskets IncludedNo
Rocker Arms IncludedNo
Intake Valve Lift0.547 in (13.894 mm)
Computer-Controlled CompatibleNo
Int. Duration Advertised (Deg)283
Lobe Separation (Deg)107
Rpm Range1900-5500
Lifter StyleHydraulic roller
Advertised Duration283 int./303 exh.
Exhaust Valve Lift With Factory Rocker Arm Ratio (0.53
Valve Springs IncludedNo
UsageStreet/Performance
Valve Lift With Factory Rocker Arm Ratio0.547 int./0.530 exh.
Camshaft Gear Attachment3-bolt
QuantitySold as a kit
Valve Stem Seals IncludedNo
Exhaust Valve Lift0.53 in (13.462 mm)
Advertised Intake Duration283
Intake Duration At 050 Inch Lift227
Exhaust Duration At 050 Inch Lift241
Timing Chain StyleGears
Timing Chain And Gears IncludedYes
Advertised Exhaust Duration303
Lifter TypeHydraulic Roller Retrofit
Duration At 050 Inch Lift227 int./241 exh.
Valve Springs RequiredYes
Lifters IncludedYes
Vendor Part NumberGK11-600-8
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
