This item is for eight (8) .020 over bore Silvolite hypereutectic flat top pistons and a moly piston ring set (Hastings/MAHLE) for Ford 460ci big block V-8 engines. P/N (8) 3191HC-020 + 2M598-020. These pistons may be used as a performance upgrade in 460ci engines originally equipped with dished pistons.

PISTON SPECIFICATIONS

• Bore: 4.380 in. (at .020 bore)
• Stroke: 3.850 in. (stock)
• Connecting Rod Length: 6.605 in. (stock); rods NOT included
• Piston Top Style: Flat top with 2-valve reliefs
• Piston Head Volume: +4.20cc
• Compression Height: 1.752 in.
• Piston Material: Hypereutectic aluminum
• Wrist Pin Diameter: 1.040 in.; pins included
• Wrist Pin Style: Press-fit only
• Ring Land Sizes: 5/64-5/64-3/16 (oil ring); rings included
• Notes: Coated skirts
• Usage: Street and mild strip; up to 75HP nitrous
• RPM Range: Idle - 6,000
• Compression Ratio (approximate): 10.9:1 w/72cc; 10.4:1 w/77cc; 8.9:1 w/97cc