and you will never be able to feel them with your fingers or measure them with a measuring device

CNC machined from heat-treated 4130 Chromoly

Driveshaft is made from a 2

Subaru EJ257 WRX STi - 79 mm Stroke

Known for their lightweight construction and remarkable strength

Driveshaft Shop Rear Axle Bar and Internal CV Upgrade, BMW F8X M3 / M4 E36 M3 and you will never beUpgrade your BMW F80 M3, F82 M4, or F83 M4 with the Driveshaft Shop Rear Axle Bar and Inner CV Upgrade, designed to handle up to 1200HP. This service strengthens your factory axles with 36 spline high grade aircraft quality bars, a Chromoly 108mm inner CV, and reinforced outer CV internals for unmatched durability. Key Features: 36 spline axle bars (OEM has 28 splines) for improved strength Chromoly 108mm inner CV with aerospace grade internals