Manley Platinum Series Lightweight Pistons, Flat Top [Bore Size 3.700 | Rod Length 5.933 | Stroke 3.543 | Compression Distance 1.220 | 42cc 13.55 | 51cc 11.63 | 52cc 11.45 | Piston Wt/Gms 388 | Piston & Pin Wt/Gms 476] (FORD 4.6L & 5.4L) : COLORADOSPEED - LATE MODEL DOMESTIC (AMERICAN MUSCLE) | IMPORT (EUROPEAN | SPORT COMPACT) AUTOMOTIVE PERFORMANCE PARTS