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7.4L (454 ci) Marine Engine MK4 (1990-Earlier)

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7.4L (454 ci) Marine Engine MK4 (1990-Earlier)

7.4L (454 ci) Marine Engine MK4 (1990-Earlier) 7.4L (454 ci) Marine Engine MK4 (1990-Earlier) 7.4L (454 ci) Marine Engine MK4 (1990-Earlier) 7.4L (454 ci) Marine Engine MK4 (1990-Earlier)

Product Details

Item Number: 7400-R


$3,749.00 plus shipping

Product Options

Reverse rotation: 

Mark 4 454ci marine engine (two piece rear main seal, oval port heads, flat tappet cam, mechanical fuel pump). ONE YEAR unlimited hours warranty. $500 core charge. This motor has been professionally remanufactured to meet or exceed GM OEM marine engine stock specifications. This 454ci marine engine is rated at 310-340 hp at the crank (depending on intake, carburation, exhaust manifolds, etc). This 454ci engine will work in all pre-1990 454ci applications with no modifications. $500.00 core charge.

This 454ci marine engine comes equipped with the following:

  • 454ci Mark 4 GM marine engine (standard rotation)
  • Corrosion resistant black urethane paint
  • Cylinder heads with heat crossover, engine block and all internal  components
  • Flat tappet cam
  • Fel-Pro marine head gaskets
  • Harmonic balancer, timing cover and circulation pump
  • One-year (parts & labor) Warranty
  • Will work in pre-1990 454ci applications with no modifications
  • Opposite rotation available for an additional $500 (flat tappet cam)
  • Oil pan not included
  • The $500.00 core charge is in addition to the price shown above.

    REVERSE ROTATION option available for an additional $500.00 - choose from drop-down above under "Product Options".


    Email or call (248) 524-9600 to place your order, or for a shipping quote.


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