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Vehicle Info NeededCOMP CAMSPART NUMBER: 249-SK12-235-2
'Xtreme 4x4' Hydraulic Flat Tappet Camshaft
$36895
Ships on 10/19/2026
Lowest Price GuaranteeChevy 262-400ci Small Block 1955-98
- Xtreme 4x4 X4254H Hydraulic Flat Tappet Camshaft Small Kit
Lift: .447''/.462''
Duration: 254°/262°
Lobe Separation Angle: 111°
RPM Range: 1000-5200
*Note: In order to use these camshafts in 1955-57 265ci blocks, it is necessary to machine a small groove in the rear main journal of the cam to allow oil flow to the top of the engine.
Strong low-end and mid-range torque, good idle.
| Operating Range: | 1000-5200 RPM |
| Duration Advertised: | 254° Intake / 262° Exhaust |
| Duration @ .050' Lift: | 210° Intake / 218° Exhaust |
| Valve Lift w/1.5 Rockers: | .447' Intake / .462' Exhaust |
| Lobe Separation Angle: | 111° |
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
Strong low end and mid-range torque, good idle.
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 Height5.2
Package Width10.4
Package Length25.4
Weight18.5 PG
Part CategoryPerformance Parts
Exh. Duration @ .050 In. (Deg)218
Cam StyleHydraulic flat tappet
Grind NumberCS X4 254H-11
Exh. Duration Advertised (Deg)262
Locks IncludedNo
Engine Make/SizeChevy Small Block (262-400)
Retainers IncludedNo
Intake Valve Lift With Factory Rocker Arm Ratio (I0.447
Int. Duration @ .050 In. (Deg)210
Assembly Lubricant IncludedYes
Basic Operating Rpm Range1,000-5,200
Pushrods IncludedNo
Gaskets IncludedNo
Rocker Arms IncludedNo
Intake Valve Lift0.447 in (11.354 mm)
Computer-Controlled CompatibleNo
Int. Duration Advertised (Deg)254
Lobe Separation (Deg)111
Rpm Range1000-5200
Lifter StyleHydraulic flat tappet
Advertised Duration254 int./262 exh.
Exhaust Valve Lift With Factory Rocker Arm Ratio (0.462
Valve Springs IncludedNo
UsageStreet/Performance
Valve Lift With Factory Rocker Arm Ratio0.447 int./0.462 exh.
QuantitySold as a kit
Valve Stem Seals IncludedNo
Exhaust Valve Lift0.462 in (11.735 mm)
Advertised Intake Duration254
Intake Duration At 050 Inch Lift210
Exhaust Duration At 050 Inch Lift218
Timing Chain StyleDouble non-roller
Timing Chain And Gears IncludedYes
Advertised Exhaust Duration262
Lifter TypeHydraulic Flat Tappet
Duration At 050 Inch Lift210 int./218 exh.
Valve Springs RequiredYes
Lifters IncludedYes
Vendor Part NumberSK12-235-2
Package Qty1
Package TypeEA
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