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Vehicle Info NeededCOMP CAMSPART NUMBER: 249-12-256-4
Xtreme Energy 256H Hydraulic Flat Tappet Camshaft Only Lift .449"/.456" Duration 256°/268° RPM Range 1200-5200
$30995
Ships on Sep 15, 2026
Lowest Price GuaranteeChevy 262-400ci Small Block 1987-98 Computer Controller
- Xtreme Energy 256H Hydraulic Flat Tappet Camshaft Only
- 1987-98 Computer Controlled
- Best in 305 or 350 Tuned Port Injected engines
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
Best in 305 or 350 tuned port injected engines.
Lift .449"/.456"
Duration 256°/268°
RPM Range 1200-5200
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 Height2.8
Package Width3.5
Package Length24.2
Weight8.9 PG
Part CategoryPerformance Parts
Exh. Duration @ .050 In. (Deg)218
Cam StyleHydraulic flat tappet
Grind NumberCS XE256H-12
Exh. Duration Advertised (Deg)268
Engine Make/SizeChevy Small Block (262-400)
Intake Valve Lift With Factory Rocker Arm Ratio (I0.449
Int. Duration @ .050 In. (Deg)212
Basic Operating Rpm Range1,200-5,200
Intake Valve Lift0.449 in (11.405 mm)
Computer-Controlled CompatibleYes
Int. Duration Advertised (Deg)256
Lobe Separation (Deg)112
Rpm Range1200-5200
Advertised Duration256 int./268 exh.
Exhaust Valve Lift With Factory Rocker Arm Ratio (0.456
UsageStreet/Performance
Valve Lift With Factory Rocker Arm Ratio0.449 int./0.456 exh.
QuantitySold individually
Exhaust Valve Lift0.456 in (11.582 mm)
Advertised Intake Duration256
Intake Duration At 050 Inch Lift212
Exhaust Duration At 050 Inch Lift218
Advertised Exhaust Duration268
Lifter TypeHydraulic Flat Tappet
Duration At 050 Inch Lift212 int./218 exh.
Valve Springs RequiredYes
Vendor Part Number12-256-4
Package Qty1
Package TypeEA
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