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Vehicle Info NeededCOMP CAMSPART NUMBER: 249-CL11-770-8
Xtreme Energy Mechanical Roller Camshaft and Lifter Kit Big Block Chevy 1965-96 Lift: .639"/.646"
$1,22595
Ships on 09/15/2026
Lowest Price GuaranteeChevy 396-454ci Big Block 1965-96
- Xtreme Energy Mechanical Roller Camshaft and Lifter Kit
- Lift: .639"/.646"
- Duration: 274°/280°
- Lobe Separation Angle: 110°
- RPM Range: 2200-6200
Mechanical Roller-Great for Power Touring. Needs 2500 stall, easy on parts. Very reliable power. Rough idle.
Big Block Chevy 1965-96
Part TypeCamshaft Kit
BrandCOMP CAMS
Package Height3.3
Package Width8.6
Package Length25.5
Weight16.95 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 (396-502)
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 And Gears IncludedNo
Advertised Exhaust Duration280
Lifter TypeMechanical Roller
Duration At 050 Inch Lift236 int./242 exh.
Valve Springs RequiredYes
Lifters IncludedYes
Vendor Part NumberCL11-770-8
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
