Manley Platinum Series Lightweight Pistons, Flat Top [Bore Size 3.552 | Rod Length 5.850 | Stroke 3.750 | Compression Distance 1.200 | 42cc 13.33 | 51cc 11.43 | 52cc 11.26 | Piston Wt/Gms 350 | Piston & Pin Wt/Gms 438] (FORD 4.6L & 5.4L) : COLORADOSPEED - LATE MODEL DOMESTIC (AMERICAN MUSCLE) | IMPORT (EUROPEAN | SPORT COMPACT) AUTOMOTIVE PERFORMANCE PARTS