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Vehicle Info NeededCOMP CAMSPART NUMBER: 249-K12-407-8
Comp Cams 'Xtreme Energy' Hydraulic Roller Camshafts
$1,37695
Ships on 09/10/2026
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 XR252HR-10 Retro-Fit Hydraulic Roller Camshaft Complete Kit
- Produces Better Throttle Response
- Produces Top Engine Horsepower
- Delivers Increased Engine Vacuum
- 1 Year Limited Warranty
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
Good for mileage and for towing, smooth idle.
Lift: .472"/.480"
Duration: 252/258
Lobe Separation Angle: 110°
RPM Range: 600-4600
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 Kit
BrandCOMP CAMS
Package Height5.2
Package Width10.6
Package Length25.4
Weight25.1 PG
Part CategoryPerformance Parts
Exh. Duration @ .050 In. (Deg)206
Cam StyleHydraulic roller tappet
Grind NumberCS XR252HR-10
Exh. Duration Advertised (Deg)258
Locks IncludedYes
Engine Make/SizeChevy Small Block (262-400)
Retainers IncludedYes
Intake Valve Lift With Factory Rocker Arm Ratio (I0.472
Int. Duration @ .050 In. (Deg)200
Assembly Lubricant IncludedNo
Basic Operating Rpm Range600-4,600
Pushrods IncludedYes
Gaskets IncludedNo
Rocker Arms IncludedNo
Intake Valve Lift0.472 in (11.989 mm)
Computer-Controlled CompatibleNo
Int. Duration Advertised (Deg)252
Lobe Separation (Deg)110
Rpm Range600-4600
Lifter StyleHydraulic roller
Advertised Duration252 int./258 exh.
Exhaust Valve Lift With Factory Rocker Arm Ratio (0.48
Valve Springs IncludedYes
UsageStreet/Performance
Valve Lift With Factory Rocker Arm Ratio0.472 int./0.480 exh.
QuantitySold as a kit
Valve Stem Seals IncludedYes
Exhaust Valve Lift0.48 in (12.192 mm)
Advertised Intake Duration252
Outside Diameter Of Outer Spring1.254 in (31.9 mm)
Intake Duration At 050 Inch Lift200
Exhaust Duration At 050 Inch Lift206
Timing Chain StyleDouble non-roller
Timing Chain And Gears IncludedYes
Advertised Exhaust Duration258
Lifter TypeHydraulic Roller
Part FitmentSemi Universal
Duration At 050 Inch Lift200 int./206 exh.
Valve Springs RequiredNo
Lifters IncludedYes
Vendor Part NumberK12-407-8
Package Qty1
Package TypeEA
No Questions
No Reviews
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Some parts are not legal for use in California or other states with similar laws / regulations
