This Chassis fits the body of all Scalextric Ford Sierra RS500. For example Ref. C3781-19-126 and all other which are identical in construction. This chassis is made for use on Carrera Univeral 132 tracks. You can use the slot.it motor mounts (only inliner) as well as the slottolution motor mounts (inliner for 13D, 18D and Sideways Inliner).