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Vehicle Info NeededCOMP CAMSPART NUMBER: 249-08-417-8
Xtreme Marine XM270HR Hydraulic Roller Camshaft Only Lift .495"/.503" Duration 270°/276° RPM Range 1200-5200
$57795
Ships on Sep 15, 2026
Lowest Price GuaranteeChevrolet 262-400ci 1987-1998OE Hydraulic Roller
- Xtreme Marine XM270HR Hydraulic Roller Camshaft Only
Lift .495"/.503"
Duration 270°/276°
RPM Range 1200-5200
Hydraulic Roller-Largest for inboard/outboard, very good mid-range power, noticeable idle.
265, 283, 307, 302, 305, 327, 350, 383, 400, 427, L46, L48, L65, LM1, LT-1, L82, L81, LS9, L83, L98, L05, LG3, LG4, LT1, LT4, Camaro, Corvette, Chevelle, Stingray, Silverado, C10, Firebird, Chevrolet, Chevy, Small Block Chevy, Caprice, Malibu, Impala, Nova, 355, GEN1, Monte Carlo, S10
Largest for inboard/outboard, very good mid-range.
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 Length24.5
Weight8.68 PG
Part CategoryPerformance Parts
Exh. Duration @ .050 In. (Deg)224
Cam StyleHydraulic roller tappet
Grind NumberCS XM 270HR-12
Exh. Duration Advertised (Deg)276
Engine Make/SizeChevy Small Block (262-400)
Intake Valve Lift With Factory Rocker Arm Ratio (I0.495
Int. Duration @ .050 In. (Deg)218
Basic Operating Rpm Range1,200-5,200
Intake Valve Lift0.495 in (12.573 mm)
Computer-Controlled CompatibleNo
Int. Duration Advertised (Deg)270
Lobe Separation (Deg)112
Rpm Range1200-5200
Advertised Duration270 int./276 exh.
Exhaust Valve Lift With Factory Rocker Arm Ratio (0.503
UsageMarine
Valve Lift With Factory Rocker Arm Ratio0.495 int./0.503 exh.
QuantitySold individually
Exhaust Valve Lift0.503 in (12.776 mm)
Advertised Intake Duration270
Intake Duration At 050 Inch Lift218
Exhaust Duration At 050 Inch Lift224
Advertised Exhaust Duration276
Lifter TypeHydraulic Roller
Part FitmentSemi Universal
Duration At 050 Inch Lift218 int./224 exh.
Valve Springs RequiredYes
Vendor Part Number08-417-8
Package Qty1
Package TypeEA
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