This is a optional RPM Long Body Mount Set, and is intended for use with the Traxxas T-Maxx, and E-Maxx monster trucks. These Long Body Mounts will simplify mounting SUV type bodies on the Traxxas Maxx Trucks. These mounts will only work with RPM Shock Towers (#80162, #80165, & #80168). These have all of the features of the standard length body mounts that are included with the RPM Shock Towers, except they are 1-1/4" longer!