For Use With Big Block Chevy 505 Engines; Forged; 4.350 Inch Bore; 4.250 Inch Stroke/ 6.135 Inch Rod Length; 1.520 Inch Compression Distance; Flat Top/ -3 CC Volume; 9.3:1 Compression Ratio With 112 CC Heads/ 8.9:1 Compression Ratio With 118 CC Heads/ 8.5:1 Compression Ratio With 124 CC Heads; 595 Grams; Set Of 8 Pistons