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Vehicle Info NeededCOMP CAMSPART NUMBER: 249-01-421-8
Comp Cams Xtreme Energy Hydraulic Roller Camshafts
$57795
Ships on 10/16/2026
Lowest Price GuaranteeChevrolet Gen VI Big Block 454ci & 502 c.i. 8 CYL. 1996-1999
- Xtreme Energy XR288HR Hydraulic Roller Camshaft
- 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
BrandCOMP CAMS
Package Height3.0
Package Width3.0
Package Length24.4
Weight11.01 PG
Part CategoryPerformance Parts
Exh. Duration @ .050 In. (Deg)242
Cam StyleHydraulic roller tappet
Grind NumberG6 XR288HR-10
Exh. Duration Advertised (Deg)294
Engine Make/SizeChevy Gen VI 454
Intake Valve Lift With Factory Rocker Arm Ratio (I0.521
Int. Duration @ .050 In. (Deg)236
Basic Operating Rpm Range2,500-6,000
Intake Valve Lift0.521 in (13.233 mm)
Computer-Controlled CompatibleNo
Int. Duration Advertised (Deg)288
Lobe Separation (Deg)110
Rpm Range2500-6000
Advertised Duration288 int./294 exh.
Exhaust Valve Lift With Factory Rocker Arm Ratio (0.54
UsageStreet/Performance
Valve Lift With Factory Rocker Arm Ratio0.521 int./0.540 exh.
QuantitySold individually
Exhaust Valve Lift0.54 in (13.716 mm)
Advertised Intake Duration288
Intake Duration At 050 Inch Lift236
Exhaust Duration At 050 Inch Lift242
Advertised Exhaust Duration294
Lifter TypeHydraulic Roller
Part FitmentSemi Universal
Duration At 050 Inch Lift236 int./242 exh.
Valve Springs RequiredYes
Vendor Part Number01-421-8
Package Qty1
Package TypeEA
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