MANLEY PLATINUM SERIES Standard Pistons, -4cc FLAT TOP [Bore Size 4.010 | Rod Length 6.125 | Stroke 3.622 | Comp Distance 1.304 | Pin Diam .927 | Piston Wt/ Gms 442 | Valve Pocket Depth Int./Exh. .185/.130] (GM LS1, LS6, LS2, L92 & LS3) : COLORADOSPEED - LATE MODEL DOMESTIC (AMERICAN MUSCLE) | IMPORT (EUROPEAN | SPORT COMPACT) AUTOMOTIVE PERFORMANCE PARTS