Available now for the 2018 Mustang GT 6-speed is our 4" aluminum shaft with CV. We have done extensive testing with stock rears and with our 9" kit and believe this to the the most cost-effective trouble-free driveshaft for the Mustang available today. Our shaft comes with a 300m stub system mounted into a billet aluminum plate to ensure not only strength but lighter weight than the normal way of doing this type of end (look closely at the CV end, it's not all steel). The shaft only weighs 35lbs and comes with special grade 12.9 uber strength hardware with back up lock nuts to ensure no loose bolts. We have been using this Billet aluminum style plate for over 10 years on thousands of 1000+Hp Supras, BMWs and many more without any bolt issues.