MANLEY PLATINUM SERIES Lightweight Pistons, -29cc Dish [Bore Size 4.165 | Rod Length 6.460 | Stroke 4.250 | Compression Distance 1.115 | Pin Diameter .927 | 64cc 10.0 | 66cc 9.9 | 70cc 9.5 | 72cc 9.4 | 78cc 9.0 | Piston Wt/Gms 457 | Piston & Pin Wt/Gms 575] (GM LS) : COLORADOSPEED - LATE MODEL DOMESTIC (AMERICAN MUSCLE) | IMPORT (EUROPEAN | SPORT COMPACT) AUTOMOTIVE PERFORMANCE PARTS