Manley Platinum Series Lightweight Pistons, 23cc Dish [Bore Size 3.700 | Rod Length 5.933 | Stroke 3.543 | Compression Distance 1.220 | 42cc 9.58 | 51cc 8.64 | 52cc 8.54 | Piston Wt/Gms 401 | Piston & Pin Wt/Gms 489] (FORD 4.6L & 5.4L) : COLORADOSPEED - LATE MODEL DOMESTIC (AMERICAN MUSCLE) | IMPORT (EUROPEAN | SPORT COMPACT) AUTOMOTIVE PERFORMANCE PARTS