Manley Platinum Series Lightweight Pistons, -31cc Dish [Bore Size 4.065 | Rod Length 6.125 | Stroke 4.050 | Compression Distance 1.085 | Pin Diameter .927 | 74.5cc 8.50 | Piston Wt/Gms 378 | Piston & Pin Wt/Gms 473] (CHRYSLER 6.1L HEMI) : COLORADOSPEED - LATE MODEL DOMESTIC (AMERICAN MUSCLE) | IMPORT (EUROPEAN | SPORT COMPACT) AUTOMOTIVE PERFORMANCE PARTS