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Vehicle Info NeededCOMP CAMSPART NUMBER: 249-SK11-445-8
Xtreme Marine XM270HR Retro-Fit Hydraulic Roller Camshaft Small Kit Lift: .510"/.510" Duration: 270°/276° RPM Range: 1600-5400
$1,30995
Ships on Oct 27, 2026
Lowest Price GuaranteeCurrently Unavailable
This product is currently not available. Please call customer service for assistance at 1-800-345-4545.
Chevrolet 396-454 c.i. 8 CYL. 1965-1996 Retro-Fit
- Xtreme Marine XM270HR Retro-Fit Hydraulic Roller Camshaft Small Kit
- Good for inboard/ outboard pleasure boats, has good idle
Installation Notes:
- Stock springs cannot be used
- Requires thrust button & wear plate
Chevelle, Camaro, Corvette, Stingray, Silverado, C10, Firebird, Chevrolet, Big Block, Chevy, BBC, 454, 427, 502, 396, Caprice, Malibu, Impala, Nova, Monte Carlo, S10, 572
Good for inboard/outboard pleasure boats, has good idle.
Lift: .510"/.510"
Duration: 270°/276°
RPM Range: 1600-5400
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 Width10.5
Package Length26.0
Weight21.0 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 Big Block (396-454)
Retainers IncludedNo
Intake Valve Lift With Factory Rocker Arm Ratio (I0.51
Int. Duration @ .050 In. (Deg)218
Assembly Lubricant IncludedNo
Basic Operating Rpm Range1,600-5,400
Pushrods IncludedNo
Gaskets IncludedNo
Rocker Arms IncludedNo
Intake Valve Lift0.51 in (12.954 mm)
Computer-Controlled CompatibleNo
Int. Duration Advertised (Deg)270
Lobe Separation (Deg)112
Rpm Range1600-5400
Lifter StyleHydraulic roller
Advertised Duration270 int./278 exh.
Exhaust Valve Lift With Factory Rocker Arm Ratio (0.51
Valve Springs IncludedNo
UsageMarine
Valve Lift With Factory Rocker Arm Ratio0.510 int./0.510 exh.
QuantitySold as a kit
Valve Stem Seals IncludedNo
Exhaust Valve Lift0.51 in (12.954 mm)
Advertised Intake Duration270
Intake Duration At 050 Inch Lift218
Exhaust Duration At 050 Inch Lift224
Timing Chain StyleDouble non-roller
Timing Chain And Gears IncludedYes
Advertised Exhaust Duration278
Lifter TypeHydraulic Roller
Part FitmentSemi Universal
Duration At 050 Inch Lift218 int./224 exh.
Valve Springs RequiredYes
Lifters IncludedYes
Vendor Part NumberSK11-445-8
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
