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Vehicle Info NeededCOMP CAMSPART NUMBER: 249-K12-417-8
Xtreme Marine XM270HR Retro-Fit Hydraulic Roller Camshaft Complete Kit Lift .495"/.503" Duration 270°/276° RPM Range 1500-5500
$1,62495
Ships on 10/23/2026
Lowest Price GuaranteeChevrolet 262-400ci 1955-1998 Retro-Fit
- Xtreme Marine XM270HR Retro-Fit Hydraulic Roller Camshaft Complete Kit
- Xtreme Marine Camshaft
- 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
Largest for inboard/outboard, good mid-range with excellent response, noticeable idle.
Lift .495"/.503"
Duration 270°/276°
RPM Range 1500-5500
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 Height5.0
Package Width10.25
Package Length25.5
Weight26.6 PG
Part CategoryPerformance Parts
Exh. Duration @ .050 In. (Deg)224
Cam StyleHydraulic roller tappet
Grind NumberXM 270 HR
Exh. Duration Advertised (Deg)276
Locks IncludedYes
Engine Make/SizeChevy Small Block (262-400)
Retainers IncludedYes
Intake Valve Lift With Factory Rocker Arm Ratio (I0.495
Int. Duration @ .050 In. (Deg)218
Assembly Lubricant IncludedNo
Basic Operating Rpm Range1,500-5,500
Pushrods IncludedNo
Gaskets IncludedNo
Rocker Arms IncludedNo
Intake Valve Lift0.495 in (12.573 mm)
Computer-Controlled CompatibleNo
Int. Duration Advertised (Deg)274
Lobe Separation (Deg)112
Rpm Range1500-5500
Lifter StyleHydraulic roller
Advertised Duration270 int./276 exh.
Exhaust Valve Lift With Factory Rocker Arm Ratio (0.503
Valve Springs IncludedYes
UsageMarine
Valve Lift With Factory Rocker Arm Ratio0.495 int./0.503 exh.
QuantitySold as a kit
Valve Stem Seals IncludedYes
Exhaust Valve Lift0.503 in (12.776 mm)
Advertised Intake Duration270
Outside Diameter Of Outer Spring1.43 in (36.3 mm)
Intake Duration At 050 Inch Lift218
Exhaust Duration At 050 Inch Lift224
Timing Chain StyleDouble non-roller
Timing Chain And Gears IncludedYes
Advertised Exhaust Duration276
Lifter TypeHydraulic Flat Tappet
Part FitmentSemi Universal
Duration At 050 Inch Lift218 int./224 exh.
Valve Springs RequiredNo
Lifters IncludedYes
Vendor Part NumberK12-417-8
Package Qty1
Package TypeEA
No Questions
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Some parts are not legal for use in California or other states with similar laws / regulations
