Manley Platinum Series Lightweight Pistons, -21cc Dish [Bore Size 4.060 | Rod Length 6.240 | Stroke 3.579/90.9mm | Compression Distance 1.220 | Pin Diameter .927 | 74.5cc 8.25 | Piston Wt/Gms 419 | Piston & Pin Wt/Gms 514] (CHRYSLER 6.1L HEMI) : COLORADOSPEED - LATE MODEL DOMESTIC (AMERICAN MUSCLE) | IMPORT (EUROPEAN | SPORT COMPACT) AUTOMOTIVE PERFORMANCE PARTS