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Comp Cams Magnum Mechanical Flat Tappet Camshafts
InfoVehicle Info Needed
COMP CAMSPART NUMBER: 249-11-551-5

Comp Cams Magnum Mechanical Flat Tappet Camshafts

$32595
ShippingShips on 09/09/2026
Lowest PriceLowest Price Guarantee

Chevy 396-454ci Big Block 1965-96
  • Marine
      • Magnum Marine 280S Mechanical Flat Tappet Camshaft
      Lift: .575"/.604"
      Duration: 280°/285°
      Lobe Separation Angle 110°
      RPM Range 2800-6300

      Solid-Jet boat with A or B impeller. Skiing, pleasure, performance.

      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.

    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 Height2.75
    Package Width2.87
    Package Length24.5
    Weight10.6 PG
    Part CategoryPerformance Parts
    Exh. Duration @ .050 In. (Deg)250
    Cam StyleMechanical flat tappet
    Grind NumberCB 280S-10
    Exh. Duration Advertised (Deg)285
    Engine Make/SizeChevy Big Block (396-454)
    Intake Valve Lift With Factory Rocker Arm Ratio (I0.575
    Int. Duration @ .050 In. (Deg)242
    Basic Operating Rpm Range2,800-6,300
    Intake Valve Lash0.028 in (0.711 mm)
    Intake Valve Lift0.575 in (14.605 mm)
    Computer-Controlled CompatibleNo
    Int. Duration Advertised (Deg)280
    Lobe Separation (Deg)110
    Rpm Range2800-6300
    Advertised Duration280 int./285 exh.
    Exhaust Valve Lift With Factory Rocker Arm Ratio (0.604
    UsageMarine
    Valve Lift With Factory Rocker Arm Ratio0.575 int./0.604 exh.
    QuantitySold individually
    Exhaust Valve Lash0.03 in (0.762 mm)
    Exhaust Valve Lift0.604 in (15.342 mm)
    Advertised Intake Duration280
    Intake Duration At 050 Inch Lift242
    Exhaust Duration At 050 Inch Lift250
    Advertised Exhaust Duration285
    Lifter TypeMechanical Flat Tappet
    Part FitmentSemi Universal
    Duration At 050 Inch Lift242 int./250 exh.
    Valve Springs RequiredYes
    Vendor Part Number11-551-5
    Package Qty1
    Package TypeEA
    No Questions
    No Reviews

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    Some parts are not legal for use in California or other states with similar laws / regulations
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