Product Description


This item is for eight (8) STANDARD bore Speed Pro Powerforged flat top pistons and a moly piston ring set (Hastings/MAHLE) for Chrysler 440ci big block V-8 engines. P/N (8) L2266F-STD + 2M692-STD.

Speed Pro Powerforged 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: 4.320 in. (at standard bore)
  • Stroke: 3.750 in. (stock)
  • Connecting Rod Length: 6.768 in. (stock); rods NOT included
  • Piston Top Style: Flat top with no valve reliefs
  • Piston Head Volume: 0.00cc
  • Compression Height: 1.991 in.
  • Piston Material: Forged aluminum
  • Wrist Pin Diameter: 1.094 in.; pins included
  • Wrist Pin Style: Press-fit only
  • Ring Land Sizes: 5/64-5/64-3/16 (oil ring); rings included
  • Notes: DurOshield coated skirts
  • Usage: Street and strip; up to 150HP nitrous
  • RPM Range: Idle - 7,000
  • Compression Ratio (approximate): 10.8:1 w/78.5cc; 9.9:1 w/88.0cc

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