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Vehicle Info NeededCOMP CAMSPART NUMBER: 249-K01-421-8
Comp Cams 'Xtreme Energy' Hydraulic Roller Camshafts
$1,62395
Ships on 10/19/2026
Lowest Price GuaranteeChevrolet Gen VI Big Block 454ci & 502 c.i. 8 CYL. 1996-1999
- Xtreme Energy XR288HR Hydraulic Roller Camshaft Complete Kit
- Produces Better Throttle Response
- Produces Top Engine Horsepower
- Delivers Increased Engine Vacuum
- 1 Year Limited Warranty
Chevelle, Camaro, Corvette, Stingray, Silverado, C10, Firebird, Chevrolet, Big Block, Chevy, BBC, 454, 427, 502, 396, Caprice, Malibu, Impala, Nova, Monte Carlo, S10, 572
Street/strip applications with 10:1+ compression and 2800+ stall. Rough idle, needs good intake and headers.
Lift: .521"/.540"
Duration: 288/294
Lobe Separation Angle: 110°
RPM Range: 2500-6000
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 Height5.1
Package Width10.5
Package Length25.5
Weight36.1 PG
Part CategoryPerformance Parts
Exh. Duration @ .050 In. (Deg)242
Cam StyleHydraulic roller tappet
Grind NumberG6 XR288HR-10
Exh. Duration Advertised (Deg)294
Locks IncludedYes
Engine Make/SizeChevy Gen VI 454
Retainers IncludedYes
Intake Valve Lift With Factory Rocker Arm Ratio (I0.521
Int. Duration @ .050 In. (Deg)236
Assembly Lubricant IncludedNo
Basic Operating Rpm Range2,500-6,000
Pushrods IncludedNo
Gaskets IncludedNo
Rocker Arms IncludedNo
Intake Valve Lift0.521 in (13.233 mm)
Computer-Controlled CompatibleNo
Int. Duration Advertised (Deg)288
Lobe Separation (Deg)110
Rpm Range2500-6000
Lifter StyleHydraulic roller
Advertised Duration288 int./294 exh.
Exhaust Valve Lift With Factory Rocker Arm Ratio (0.54
Valve Springs IncludedYes
UsageStreet/Performance
Valve Lift With Factory Rocker Arm Ratio0.521 int./0.540 exh.
QuantitySold as a kit
Valve Stem Seals IncludedYes
Exhaust Valve Lift0.54 in (13.716 mm)
Advertised Intake Duration288
Outside Diameter Of Outer Spring1.437 in (36.5 mm)
Intake Duration At 050 Inch Lift236
Exhaust Duration At 050 Inch Lift242
Timing Chain StyleDouble roller
Timing Chain And Gears IncludedYes
Advertised Exhaust Duration294
Lifter TypeHydraulic Roller
Duration At 050 Inch Lift236 int./242 exh.
Valve Springs RequiredNo
Lifters IncludedYes
Vendor Part NumberK01-421-8
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
