1883-4165 6.0 - LS2 -6.2 - LS3 - L98 - LQ9 - LS7 - LSA - LSX Stroker Chevy LS SX Series -15cc Dish Top LS1,LS2,LS3 and LS7 Forged Piston Set 4.165 inch bore Pin Dia.: 0.927" Comp Height: 1.165"