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177 Fulford Dr.
Harkers Island, NC 28531
(252) 504-3355
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Engine 7.4L 454 LH GM HO 390 HP Long Block V8 Marine Engine


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  • Part #: PPG7.4LBHO


GEN VI 454 High Performance

The best way to distinguish this engine from the other 7.4L engines is that it has rectangular port heads and a high performance camshaft. They are the same heads that are used on the 502 engines.

Engine Details

  • Displacement: 7.4L (454 CID)
  • Horsepower: 385 hp @ 5200 RPM
  • Torque: 450 lb-ft @ 4000 RPM MPI
  • High Performance Camshaft
  • 1 Piece Rear Main Seal
  • Rectangular Port Head
Engine Includes:
  • Oil Pan
  • Front Timing Cover
  • Harmonic Balancer
  • Valve Covers
This 454 Generation 6 Marine Base Engine feature the high output square port cylinder heads, and Roller Camshaft. 

This will directly replace all 454 7.4 liter engines with 365 or more HP that are 1992 and newer.  This will replace earlier engines as well but you will need to add an electric fuel pump.  There is no provision for a mechanical fuel pump on the block. 

If you have an engine with  less than 365 factory HP this engine will work, however you will need to purchase a new intake manifold and Carburetor.

Add Ons:

All engine prices are plus discounted freight to your destination

1  Year  Limited  Warranty

Call (252) 504-3355 or click here to order or for more information
(Pricing, availability and specifications may change without notice)


Price is plus shipping
Engines cannot be paid for by Credit Card or by PayPal.




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