cut at the rear "axle" on the back side that is the one cut you have to make to get the front and rear of the system out... I have removed 6+ systems from STs and I have only made 1 cut to get each one out.I just picked up the Ford Performance Cat-Back Exhaust for my 2016 FST. I need to cut off the old system first to install this one. Is there a specific location to cut that old system off from, rather than just eyeballing it?