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Vehicle Info NeededCOMP CAMSPART NUMBER: 249-SK12-408-8
Comp Cams Xtreme Energy Hydraulic Roller Camshafts
$1,27695
Ships on 10/19/2026
Lowest Price GuaranteeChevy 262-400ci Small Block 1955-98
For engines NOT originally equipped with a hydraulic roller camshaft.
For engines NOT originally equipped with a hydraulic roller camshaft.
- Xtreme Energy XR258HR Retro-Fit Hydraulic Roller Camshaft Small Kit
Lift: .480"/.487"
Duration: 258/264
Lobe Separation Angle: 110°
RPM Range: 1000-5000
Strong torque, good mileage, stock to mildly modified combinations.
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 torque, good mileage, stock to mildly modified combinations.
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 Width10.6
Package Length25.4
Weight19.1 PG
Part CategoryPerformance Parts
Exh. Duration @ .050 In. (Deg)212
Cam StyleHydraulic roller tappet
Grind NumberCS XR258HR-10
Exh. Duration Advertised (Deg)264
Locks IncludedNo
Engine Make/SizeChevy Small Block (262-400)
Retainers IncludedNo
Intake Valve Lift With Factory Rocker Arm Ratio (I0.48
Int. Duration @ .050 In. (Deg)206
Assembly Lubricant IncludedNo
Basic Operating Rpm Range1,000-5,000
Pushrods IncludedNo
Gaskets IncludedNo
Rocker Arms IncludedNo
Intake Valve Lift0.48 in (12.192 mm)
Computer-Controlled CompatibleNo
Int. Duration Advertised (Deg)258
Lobe Separation (Deg)110
Rpm Range1000-5000
Lifter StyleHydraulic roller
Advertised Duration258 int./264 exh.
Exhaust Valve Lift With Factory Rocker Arm Ratio (0.487
Valve Springs IncludedNo
UsageStreet/Performance
Valve Lift With Factory Rocker Arm Ratio0.480 int./0.487 exh.
QuantitySold as a kit
Valve Stem Seals IncludedNo
Exhaust Valve Lift0.487 in (12.37 mm)
Advertised Intake Duration258
Intake Duration At 050 Inch Lift206
Exhaust Duration At 050 Inch Lift212
Timing Chain StyleDouble non-roller
Timing Chain And Gears IncludedYes
Advertised Exhaust Duration264
Lifter TypeHydraulic Roller
Part FitmentSemi Universal
Duration At 050 Inch Lift206 int./212 exh.
Valve Springs RequiredYes
Lifters IncludedYes
Vendor Part NumberSK12-408-8
Package Qty1
Package TypeEA
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