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Vehicle Info NeededCOMP CAMSPART NUMBER: 249-11-461-8
Xtreme Marine XM308HR Retro-Fit Hydraulic Roller Camshaft Only Lift .575"/.575" Duration 308°/314° RPM Range 3500-6500
$57795
Ships on 09/15/2026
Lowest Price GuaranteeChevrolet 396-454 c.i. 8 CYL. 1965-1996 Retro-Fit
- Xtreme Marine XM308HR Retro-Fit Hydraulic Roller Camshaft Only
Lift .575"/.575"
Duration 308°/314°
RPM Range 3500-6500
Hydraulic Roller-Good in jet boat with B impeller with 10:1 compression running river drags or Bracket Racing.
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 in jet boat with B impeller with 10:1+ compression, running river drags or bracket racing.
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 Height2.88
Package Width6.58
Package Length24.06
Weight10.94 PG
Part CategoryPerformance Parts
Exh. Duration @ .050 In. (Deg)260
Cam StyleHydraulic roller tappet
Grind NumberCB XM 308HR-12
Exh. Duration Advertised (Deg)314
Engine Make/SizeChevy Big Block (396-454)
Intake Valve Lift With Factory Rocker Arm Ratio (I0.575
Int. Duration @ .050 In. (Deg)254
Basic Operating Rpm Range3,500-6,500
Intake Valve Lift0.575 in (14.605 mm)
Computer-Controlled CompatibleNo
Int. Duration Advertised (Deg)308
Lobe Separation (Deg)112
Rpm Range3500-6500
Advertised Duration308 int./314 exh.
Exhaust Valve Lift With Factory Rocker Arm Ratio (0.575
UsageMarine
Valve Lift With Factory Rocker Arm Ratio0.575 int./0.575 exh.
QuantitySold individually
Exhaust Valve Lift0.575 in (14.605 mm)
Advertised Intake Duration308
Intake Duration At 050 Inch Lift254
Exhaust Duration At 050 Inch Lift260
Advertised Exhaust Duration314
Lifter TypeHydraulic Roller
Part FitmentSemi Universal
Duration At 050 Inch Lift254 int./260 exh.
Valve Springs RequiredYes
Vendor Part Number11-461-8
Package Qty1
Package TypeEA
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