We have unleashed another Mustang RTR Spec 5 on the streets! This time around it is a 2023 Mustang RTR Spec 5 in Atlas Blue. This particular build has an awesome story behind it so let’s dive right in.This story began at GridLife Midwest where Vaughn Gittin Jr., Chelsea DeNofa and James Deane drifted around Gingerman Raceway in their Mustang RTR Spec 5-D’s.