2015-19 Mustang DSS 800HP Direct-Fit Axle, Right RA8506X4Daniel "Mitch" StavelyFebruary 21, 2017This is a must for supercharged applications. I installed the half shafts in my driveway on jack stands. I found the easiest way to put them in is to take the spindle completely off. It’s not too bad, but there were no instructions in the box. Also, there is a big difference in quality in comparison to the stock half shafts. I feel they are just as good as the Ford performance half shafts, if not better, so save a little money with these. Brenspeed is always willing to help and back their products. Wish they had a shop in Jacksonville, Fl. I know plenty of business would be forthcoming for sure.