Extreme heavy-duty steel CV (constant velocity) driveshafts are engineered to satisfy the performance and durability needs of the most demanding drivers. Designed specifically for monster truck applications, these shafts are built to withstand the brutal torque from the 540XL motor and the massive grip of the huge Sledgehammer^® tires. Traxxas’ unique, splined telescoping design delivers full-range articulation, so there is never a need to limit suspension travel. Since they are made by Traxxas, you can count on easy installation and perfect fit in your Traxxas model.