For the first time, the Mustang RTR Spec 5 is now available! With the success of our Mustang RTR Spec 5 10th anniversary program we are finally offering the Spec 5 to everyone. Mustang RTR Spec 5 will be exclusively built by RTR through our Built by RTR program or by an authorized RTR Vehicles upfitter. Each part has been engineered to improve the overall look, functionality, and performance of the already superior Mustang. All Spec 5 components have been track-tested and validated by professional driver and Formula Drift Champion Vaughn Gittin Jr.