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Vehicle Info NeededCOMP CAMSPART NUMBER: 249-SK11-451-8
Xtreme Marine XM284HR Retro-Fit Hydraulic Roller Camshaft Small Kit Lift: .547"/.547" Duration: 284°/290° PM Range: 2200-5800
$1,30995
Ships on 10/23/2026
Lowest Price GuaranteeChevrolet 396-454 c.i. 8 CYL. 1965-1996 Retro-Fit
- Xtreme Marine XM284HR Retro-Fit Hydraulic Roller Camshaft Small Kit
- Good for jet boat with A impeller
- Great for pleasure or performance use
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 jet boat with A impeller. Great for pleasure or mild performance use.
Lift: .547"/.547"
Duration: 284°/290°
PM Range: 2200-5800
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 Width10.5
Package Length26.0
Weight21.0 PG
Part CategoryPerformance Parts
Exh. Duration @ .050 In. (Deg)236
Cam StyleHydraulic roller tappet
Grind NumberCB XM 284HR-12
Exh. Duration Advertised (Deg)290
Locks IncludedNo
Engine Make/SizeChevy Big Block (396-454)
Retainers IncludedNo
Intake Valve Lift With Factory Rocker Arm Ratio (I0.547
Int. Duration @ .050 In. (Deg)230
Assembly Lubricant IncludedNo
Basic Operating Rpm Range2,200-5,800
Pushrods IncludedNo
Gaskets IncludedNo
Rocker Arms IncludedNo
Intake Valve Lift0.547 in (13.894 mm)
Computer-Controlled CompatibleNo
Int. Duration Advertised (Deg)284
Lobe Separation (Deg)112
Rpm Range2200-5800
Lifter StyleHydraulic roller
Advertised Duration284 int./290 exh.
Exhaust Valve Lift With Factory Rocker Arm Ratio (0.547
Valve Springs IncludedNo
UsageMarine
Valve Lift With Factory Rocker Arm Ratio0.547 int./0.547 exh.
QuantitySold as a kit
Valve Stem Seals IncludedNo
Exhaust Valve Lift0.547 in (13.894 mm)
Advertised Intake Duration284
Intake Duration At 050 Inch Lift230
Exhaust Duration At 050 Inch Lift236
Timing Chain StyleDouble non-roller
Timing Chain And Gears IncludedYes
Advertised Exhaust Duration290
Lifter TypeHydraulic Roller
Part FitmentSemi Universal
Duration At 050 Inch Lift230 int./236 exh.
Valve Springs RequiredYes
Lifters IncludedYes
Vendor Part NumberSK11-451-8
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
