This is a replacement Traxxas Steering Bellcrank Set, and is intended for use with the Traxxas Slash 4 x 4 short course truck. This set includes the parts necessary to rebuild the bellcrank system. This bellcrank set is also an excellent upgrade for the 2WD Traxxas Slash and Rustler trucks, as well as the Bandit 2WD buggy. This bellcrank set eliminates the need for a servo saver style servo horn for more precise steering. Traxxas Bandit. Traxxas Rustler. Traxxas Slash. Traxxas Slash 4 x 4.