In relation to motorsport, Group T4 is a set of technical specifications for modified production cross-country side-by-side vehicles used in off-road Cross-Country Rallying (also called Rally Raid). The group is governed by the Fédération Internationale de l'Automobile (FIA) and defined in appendix J, article 286a of its International Sporting Code.[1] The vehicles are modified for competition purposes from vehicles manufactured in numbers greater than 250 in a 12 month period. They must be road legal, but typically differ from the 'cars' defined in Group T1 and Group T2 by a much lower minimum weight (900 kg) and no requirement for parts such as a windscreen or windows. The vehicles must be powered by one engine and without driving aids such as traction control or ABS. Though the vehicles do not need to be homologated, a reference vehicle needs to be provided to the FIA for approval.[2]