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Vehicle Info NeededCOMP CAMSPART NUMBER: 249-CL11-676-4
Xtreme Energy Mechanical Flat Camshaft and Lifter Kit Lift: .553"/.568"
$45695
Ships on 10/22/2026
Lowest Price GuaranteeChevy Big Block 396-454ci 1965-96
- Xtreme Energy Mechanical Flat Camshaft and Lifter Kit
- Lift: .553"/.568"
- Duration: 268°/274°
- Lobe Separation Angle: 110°
- RPM Range 1600-6000
- Produces Better Throttle Response
- Produces Top Engine Horsepower
- Delivers Increased Engine Vacuum
- 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
Great for street machines, largest cam for stock converter.
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 Height3.1
Package Width5.7
Package Length25.3
Weight14.7 PG
Part CategoryPerformance Parts
Exh. Duration @ .050 In. (Deg)236
Cam StyleMechanical flat tappet
Grind NumberCB XS268S-10
Exh. Duration Advertised (Deg)274
Locks IncludedNo
Engine Make/SizeChevy Big Block (396-502)
Retainers IncludedNo
Intake Valve Lift With Factory Rocker Arm Ratio (I0.553
Int. Duration @ .050 In. (Deg)230
Assembly Lubricant IncludedYes
Basic Operating Rpm Range1,600-6,000
Pushrods IncludedNo
Gaskets IncludedNo
Intake Valve Lash0.016 in (0.406 mm)
Rocker Arms IncludedNo
Intake Valve Lift0.553 in (14.046 mm)
Computer-Controlled CompatibleNo
Int. Duration Advertised (Deg)268
Lobe Separation (Deg)110
Rpm Range1600-6000
Lifter StyleMechanical flat tappet
Advertised Duration268 int./274 exh.
Exhaust Valve Lift With Factory Rocker Arm Ratio (0.568
Valve Springs IncludedNo
UsageStreet/Performance
Valve Lift With Factory Rocker Arm Ratio0.553 int./0.568 exh.
QuantitySold as a kit
Valve Stem Seals IncludedNo
Exhaust Valve Lash0.019 in (0.483 mm)
Exhaust Valve Lift0.568 in (14.427 mm)
Advertised Intake Duration268
Intake Duration At 050 Inch Lift230
Exhaust Duration At 050 Inch Lift236
Timing Chain And Gears IncludedNo
Advertised Exhaust Duration274
Lifter TypeMechanical Flat Tappet
Duration At 050 Inch Lift230 int./236 exh.
Valve Springs RequiredYes
Lifters IncludedYes
Vendor Part NumberCL11-676-4
Package Qty1
Package TypeEA
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