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Forged Dome Top PistonsSmall Block Chevy 400Bore 4.155 in. (+.030 in.)Stroke 4.000 in.Rod Length: 6.000 in.Head Volume: 6.2 ccWeight: 445 GramsRing Size 1/16, 1/16, 3/16 in.Sold Individually, Left Side ��FeaturesSmooth flow for optimum flame travelWork with angle-milled headsValve reliefs to accommodate oversized valves and high-lift camsJE 51S wrist pins (130g)Double spiral locksOil rail supportSpecsRod Length 6.000"Dome Volume 3ccCompression Height 1.000"Compression Ratio:14.7:1 with 58cc head13.5:1 with 64cc head11.7:1 with 76cc head