DSS Rear Axle Bar and Inner CV upgrade for the F10 M5 / F13 M6 DSS has developed a set of axle bars, inner CV, and outer CV internal upgrades. Using their 36 spline high-grade aircraft quality bars (stock axle bars are 28 splines), custom Chromoly CV cage, and race set makes these axles practically indestructible. Driveshaft Shop's Chromoly 108 mm inner CV is a direct replacement for the stock unit and features full aerospace grade internals. The factory M5 / M6 outer CV housing is made from a very strong material, and they upgrade the internals to an aerospace grade set also. Customer must send in OEM axles for assembly. DSS will temper and shot-peen the outer housings, install factory-style metal covers on the outer CV (double o-ring sealed), and install their new cage/race internals along with 36 spline bars and 108mm inner CV. Rated to 1200HP with a 1-year warranty.