DIAMOND Racing STREET/STRIP FLAT TOP Pistons [Bore 4.060 | Stroke 4.000 | Rod 6.125 | C.D. 1.115 | Weight 418 | Pin .927 x 2.500 | CC's -2.0cc | 62cc 12.5 | 66cc 11.9 | 70cc 11.4] (GM 6.0L LQ4 & LQ9) : COLORADOSPEED - LATE MODEL DOMESTIC (AMERICAN MUSCLE) | IMPORT (EUROPEAN | SPORT COMPACT) AUTOMOTIVE PERFORMANCE PARTS