Seamless 4130 chromoly with post weld T5 Deathproof heat treatment, T5 Deathproof heat treated 4140 chromoly 19mm / 20mm
hollow chromoly 48 spline spindle that is pressed into the right arm, 1-pc sprocket/spindle boss with standard and Nano-drive sprocket positions and a flush mount spindle bolt. RHD/LHD compatible
