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Vehicle Info NeededCOMP CAMSPART NUMBER: 249-12-770-8
Xtreme Energy Mechanical Roller Camshaft Small Block Chevy 1955-98 Lift: .564"/.570"
$57795
Ships on 09/14/2026
Lowest Price GuaranteeChevy 262-400ci Small Block 1955-98
- Xtreme Energy Mechanical Roller Camshaft
- Lift: .564"/.570"
- 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.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
Great for power touring. Needs 2500+ stall, easy on parts. Rough idle.
Small Block Chevy 1955-98
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
BrandCOMP CAMS
Package Height2.7
Package Width2.8
Package Length24.4
Weight8.6 PG
Part CategoryPerformance Parts
Exh. Duration @ .050 In. (Deg)242
Cam StyleMechanical roller tappet
Grind NumberCS XR274 R-10
Exh. Duration Advertised (Deg)280
Engine Make/SizeChevy Small Block (262-400)
Intake Valve Lift With Factory Rocker Arm Ratio (I0.564
Int. Duration @ .050 In. (Deg)236
Basic Operating Rpm Range2,200-6,200
Intake Valve Lash0.016 in (0.406 mm)
Intake Valve Lift0.564 in (14.326 mm)
Computer-Controlled CompatibleNo
Int. Duration Advertised (Deg)274
Lobe Separation (Deg)110
Rpm Range2200-6200
Advertised Duration274 int./280 exh.
Exhaust Valve Lift With Factory Rocker Arm Ratio (0.57
UsageStreet/Performance
Valve Lift With Factory Rocker Arm Ratio0.564 int./0.570 exh.
QuantitySold individually
Exhaust Valve Lash0.018 in (0.457 mm)
Exhaust Valve Lift0.57 in (14.478 mm)
Advertised Intake Duration274
Intake Duration At 050 Inch Lift236
Exhaust Duration At 050 Inch Lift242
Advertised Exhaust Duration280
Lifter TypeMechanical Roller
Part FitmentSemi Universal
Duration At 050 Inch Lift236 int./242 exh.
Valve Springs RequiredYes
Vendor Part Number12-770-8
Package Qty1
Package TypeEA
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