Manley Platinum Series Lightweight Pistons, 18cc Spherical Dish [Bore Size 3.552 | Rod Length 5.850 | Stroke 3.750 | Compression Distance 1.200 | 42cc 10.04 | 51cc 8.97 | 52cc 8.87 | Piston Wt/Gms 372 | Piston & Pin Wt/Gms 460] (FORD 4.6L & 5.4L) : COLORADOSPEED - LATE MODEL DOMESTIC (AMERICAN MUSCLE) | IMPORT (EUROPEAN | SPORT COMPACT) AUTOMOTIVE PERFORMANCE PARTS