MANLEY 4340 Forged Steel Crankshaft [Design LW | Reluctor Wheel 58 Tooth | Stroke 4.100 | Minimum Rod Length 6.125 | Main Journal Diameter 2.559 | Rod Journal Diameter 2.100 | Bobweight (grams) 1800 | Total Weight (lbs.) 51-53] (GM LS7) : COLORADOSPEED - LATE MODEL DOMESTIC (AMERICAN MUSCLE) | IMPORT (EUROPEAN | SPORT COMPACT) AUTOMOTIVE PERFORMANCE PARTS