This IMS made spool is a direct fit for the 15+ challenger rear ZF differential and will work with all gear ratios. Spools start as a piece of chromoly steel and are then turned, splined, heat treated and finished in house.

These spools can have an upgraded 35 spline option. This requires and includes custom stub shafts.

Add the ultimate traction aid to your rear diff and cut weight while doing it! Spools come with new bearings and races.

This item is proudly designed, engineered, and manufactured in house at IMS.

32 Spline - SKU: IMS 3960

35 Spline - SKU: IMS 3961