Forged Coated 21CC Dome Pistons & Moly Rings Compatible With BB 396 325/350 HP 40 Oversize

This item is for eight (8) .040-in. over bore forged 21cc dome pistons & moly rings compatible with Chevrolet 396ci big block V-8 engines. These pistons are a copy of the 1965-1969 396-325/350HP pistons. 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: 4.134 in. (at .040 bore) Stroke: 3.766 in. (stock) Connecting Rod Length: 6.135 in. (stock); rods NOT included Piston Top Style: Dome with 1-valve reliefs Piston Head Volume: -21.00cc Compression Height: 1.760 in. Piston Material: Forged aluminum Wrist Pin Diameter: .990 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; 1965-69 396-325/350HP Usage: Street and mild strip; up to 150HP nitrous RPM Range: Idle - 6,500 Compression Ratio (approximate): 9.73:1 w/100.9cc; 9.01:1 w/109.4cc; 8.01:1 w/124cc