DIAMOND Racing STREET/STRIP FLAT TOP Pistons [Bore 4.030 | Stroke 3.622 | Rod 6.098 | C.D. 1.331 | Weight 449 | Pin .945 x 2.500 | CC's -2.0cc | 62cc 11.3 | 66cc 10.7 | 70cc 10.3] (GM 6.0L LQ4 & LQ9) : COLORADOSPEED - LATE MODEL DOMESTIC (AMERICAN MUSCLE) | IMPORT (EUROPEAN | SPORT COMPACT) AUTOMOTIVE PERFORMANCE PARTS