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Vehicle Info NeededCOMP CAMSPART NUMBER: 249-SK08-417-8
Xtreme Marine XM270HR Hydraulic Roller Camshaft Small Kit Lift: .495"/.503" Duration: 270°/276° RPM Range: 1200-5200
$96295
Ships on 10/23/2026
Lowest Price GuaranteeChevrolet 262-400ci 1987-1998OE Hydraulic Roller
- Xtreme Marine XM270HR Hydraulic Roller Camshaft Small Kit
- Cam Family: Xtreme Marine™ 1987-1998 305-350 Originally Equipped With Hydraulic Roller Camshaft, Except LT1 and LT4.
- Largest for inboard/outboard, very good mid-range power, noticeable idle
Installation note: Stock springs cannot be used.
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, very good mid-range.
Lift: .495"/.503"
Duration: 270°/276°
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.
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Part TypeCamshaft Kit
BrandCOMP CAMS
Package Height5.0
Package Width10.25
Package Length25.25
Weight18.17 PG
Part CategoryPerformance Parts
Exh. Duration @ .050 In. (Deg)224
Cam StyleHydraulic roller tappet
Grind NumberXM270HR
Exh. Duration Advertised (Deg)276
Locks IncludedNo
Engine Make/SizeChevy Small Block (262-400)
Retainers IncludedNo
Intake Valve Lift With Factory Rocker Arm Ratio (I0.495
Int. Duration @ .050 In. (Deg)218
Assembly Lubricant IncludedNo
Basic Operating Rpm Range1,200-5,200
Pushrods IncludedNo
Gaskets IncludedNo
Rocker Arms IncludedNo
Intake Valve Lift0.495 in (12.573 mm)
Computer-Controlled CompatibleNo
Int. Duration Advertised (Deg)270
Lobe Separation (Deg)112
Rpm Range1200-5200
Lifter StyleHydraulic roller
Advertised Duration270 int./276 exh.
Exhaust Valve Lift With Factory Rocker Arm Ratio (0.503
Valve Springs IncludedNo
UsageMarine
Valve Lift With Factory Rocker Arm Ratio0.495 int./0.503 exh.
QuantitySold as a kit
Valve Stem Seals IncludedNo
Exhaust Valve Lift0.503 in (12.776 mm)
Advertised Intake Duration270
Intake Duration At 050 Inch Lift218
Exhaust Duration At 050 Inch Lift224
Timing Chain StyleDouble roller
Timing Chain And Gears IncludedYes
Advertised Exhaust Duration276
Lifter TypeHydraulic Roller
Part FitmentSemi Universal
Duration At 050 Inch Lift218 int./224 exh.
Valve Springs RequiredYes
Lifters IncludedYes
Vendor Part NumberSK08-417-8
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
