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Vehicle Info NeededCOMP CAMSPART NUMBER: 249-CL11-551-5
Comp Cams Magnum Hydraulic Roller Camshafts
$48295
Ships on 10/19/2026
Lowest Price GuaranteeChevy 396-454ci Big Block 1965-96Marine
- Magnum Marine 270B Mechanical Flat Tappet Camshaft & Lifter Kit
- Cams Are Very Aggressive
- Designed For Performance Oriented Vehicles
- Deliver More Power Than Standard Camshafts
- 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
Jet boat with A or B impeller. Skiing, pleasure, performance.
Lift: .575"/.603"
Duration: 280°/285°
Lobe Separtation Angle: 110°
RPM Range: 2800-6300
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 Height3.1
Package Width5.7
Package Length25.4
Weight14.8 PG
Part CategoryPerformance Parts
Exh. Duration @ .050 In. (Deg)250
Cam StyleMechanical flat tappet
Grind Number280S
Exh. Duration Advertised (Deg)285
Locks IncludedNo
Engine Make/SizeChevy Big Block (396-454)
Retainers IncludedNo
Intake Valve Lift With Factory Rocker Arm Ratio (I0.575
Int. Duration @ .050 In. (Deg)242
Assembly Lubricant IncludedYes
Basic Operating Rpm Range2,800-6,300
Pushrods IncludedNo
Gaskets IncludedNo
Rocker Arms IncludedNo
Intake Valve Lift0.575 in (14.605 mm)
Computer-Controlled CompatibleNo
Int. Duration Advertised (Deg)280
Lobe Separation (Deg)110
Rpm Range2800-6300
Lifter StyleMechanical flat tappet
Advertised Duration280 int./285 exh.
Exhaust Valve Lift With Factory Rocker Arm Ratio (0.604
Valve Springs IncludedNo
UsageMarine
Valve Lift With Factory Rocker Arm Ratio0.575 int./0.604 exh.
QuantitySold as a kit
Valve Stem Seals IncludedNo
Exhaust Valve Lift0.604 in (15.342 mm)
Advertised Intake Duration280
Intake Duration At 050 Inch Lift242
Exhaust Duration At 050 Inch Lift250
Timing Chain And Gears IncludedNo
Advertised Exhaust Duration285
Lifter TypeMechanical Flat Tappet
Part FitmentSemi Universal
Duration At 050 Inch Lift242 int./250 exh.
Valve Springs RequiredYes
Lifters IncludedYes
Vendor Part NumberCL11-551-5
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
