For Use With Small Block Chevy 400 Engines; Forged; 4.155 Inch Bore; 0.030 Inch Oversized; 3.750 Inch Stroke/ 5.700 Inch Rod Length; 1.425 Inch Compression Distance; Dish Top/ -36 CC Volume; 9:1 Compression Ratio With 58 CC Heads/ 8.7:1 Compression Ratio With 64 CC Heads/ 7.8:1 Compression Ratio With 70 CC Heads; 495 Grams; Set Of 8 Pistons