This is a replacement RPM 0° and 3° Hybrid Gearbox Rear Mount Set, intended for use with the optional RPM RPM73612, RPM73614 and RPM73615 Gearbox Housings only. These will not work with stock Traxxas or any other aftermarket gearboxes. Includes: (1) left 0° rear mount (1) right 0° rear mount (1) left 3° rear mount (1) right 3° rear mount (2) gear cover mounts Notes: For use with RPM RPM73612, RPM73614 and RPM73615 Gearbox Housings only. They will not work with stock Traxxas or any other aftermarket gearboxes.