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Vehicle Info NeededCOMP CAMSPART NUMBER: 249-SK11-770-8
Xtreme Energy Mechanical Roller Camshaft Small Kit Big Block Chevy 1965-96 Lift: .639"/.646"
$1,30995
Ships on 10/23/2026
Lowest Price GuaranteeChevy 396-454ci Big Block 1965-96
- Xtreme Energy Mechanical Roller Camshaft Small Kit
- Lift: .639"/.646"
- Duration: 274°/280°
- Lobe Separation Angle: 110°
- RPM Range: 2200-6200
- Great for Power Touring
- Needs 2500 stall, easy on parts
- Very reliable power
- Rough idle
Installation Notes: - Stock springs cannot be used
- Requires thrust button & wear plate
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 Power Touring. Needs 2500+ stall, easy on parts. Very reliable power. Rough idle.
Big Block Chevy 1965-96
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 Width10.25
Package Length25.5
Weight15.0 PG
Part CategoryPerformance Parts
Exh. Duration @ .050 In. (Deg)242
Cam StyleMechanical roller tappet
Grind NumberXR274R
Exh. Duration Advertised (Deg)280
Locks IncludedNo
Engine Make/SizeChevy Big Block (396-454)
Retainers IncludedNo
Intake Valve Lift With Factory Rocker Arm Ratio (I0.639
Int. Duration @ .050 In. (Deg)236
Assembly Lubricant IncludedNo
Basic Operating Rpm Range2,200-6,200
Pushrods IncludedNo
Gaskets IncludedNo
Intake Valve Lash0.016 in (0.406 mm)
Rocker Arms IncludedNo
Intake Valve Lift0.639 in (16.231 mm)
Computer-Controlled CompatibleNo
Int. Duration Advertised (Deg)274
Lobe Separation (Deg)110
Rpm Range2200-6200
Lifter StyleMechanical roller
Advertised Duration274 int./280 exh.
Exhaust Valve Lift With Factory Rocker Arm Ratio (0.646
Valve Springs IncludedNo
UsageStreet/Performance
Valve Lift With Factory Rocker Arm Ratio0.639 int./0.646 exh.
QuantitySold as a kit
Valve Stem Seals IncludedNo
Exhaust Valve Lash0.018 in (0.457 mm)
Exhaust Valve Lift0.646 in (16.408 mm)
Advertised Intake Duration274
Intake Duration At 050 Inch Lift236
Exhaust Duration At 050 Inch Lift242
Timing Chain StyleDouble roller
Timing Chain And Gears IncludedYes
Advertised Exhaust Duration280
Lifter TypeMechanical Roller
Part FitmentSemi Universal
Duration At 050 Inch Lift236 int./242 exh.
Valve Springs RequiredYes
Lifters IncludedYes
Vendor Part NumberSK11-770-8
Package Qty1
Package TypeEA
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