Product Description


This item is for eight (8) .040 over bore Speed Pro Powerforged flat top pistons for Ford 351ci Cleveland V-8 engines. P/N (8) L2379F-040. These pistons can be used as a performance upgrade in engines originally equipped with dish top pistons.

Speed Pro forged pistons are made from extruded VMS-75 aluminum alloy that is forged under 3,000 tons of pressure to "near neat" shape. After that, they are machined to their final configuration. These pistons offer excellent strength and durability and are capable of taking the punishment that is dished out on the street and in competition.


  • Bore: 4.040 in. (at .040 bore)
  • Stroke: 3.500 in. (stock)
  • Connecting Rod Length: 5.780 in. (stock); rods NOT included
  • Piston Top Style: Flat top with 2-valve reliefs
  • Piston Head Volume: +1.50cc
  • Compression Height: 1.647 in.
  • Piston Material: Forged aluminum
  • Wrist Pin Diameter: .912 in.; pins included
  • Wrist Pin Style: Press-fit only
  • Ring Land Sizes: 5/64-5/64-3/16 (oil ring); rings not included
  • Notes: DurOshield coated skirts
  • Usage: Street and mild strip; up to 150HP nitrous
  • RPM Range: Idle - 6,500
  • Compression Ratio (approximate): 10.8:1 w/58.6cc; 10.2:1 w/63cc; 9.8:1 w/67cc; 8.9:1 w/76.2cc

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