SPEED PRO Forged Coated Flat Top 4VR Pistons Set/8 Chrysler/Dodge 440 6-Pack 030

This item is for eight (8) .030 over bore Speed Pro Powerforged flat top pistons with 4-valve reliefs for Chrysler 440ci big block V-8 engines. P/N (8) L2355F-030. These pistons are the Speed Pro version of the 1970-1972 "Six Pack" pistons.

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.

PISTON SPECIFICATIONS

• Bore: 4.350 in. (at .030 bore)
• Stroke: 3.750 in. (stock)
• Connecting Rod Length: 6.768 in. (stock); rods NOT included
• Piston Top Style: Flat top with 4-valve reliefs
• Piston Head Volume: +7.00cc
• Compression Height: 2.061 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 not included
• Notes: 1970-72 "Six Pack"; DurOshield coated skirts
• Usage: Street and strip; up to 150HP nitrous
• RPM Range: Idle - 7,000
• Compression Ratio (approximate): 10.1:1 w/78.5cc; 9.3:1 w/88.0cc