This is an optional MIP Rear X-DUTY CVD Kit, and is intended for use with the Traxxas Slash, and Traxxas Slash 4x4. Designed for “High Voltage” systems, the MIP X-Duty CVD was tested using the Castle Creations “Mamba Monster” Brushless System for a punishing test session. MIP Spline Technology provides smoother telescoping action than the stock parts. Additionally, MIP X-Duty CVD Drives have a 5/8 diameter CVD joint with 3/32 drive pin that has been machined from high grade Carbon Steel and hardened to perfection, for the ultimate in added strength and durability. This kit includes all the parts and hardware necessary to replace the rear drive shafts.