My car is a convertible, they don't really approve of them at the track without a certified roll bar. I'm not cutting up my interior for a one time 1/4 mile pass. I use it as a fun street car. My other car is my daily driver, a 21 Explorer ST that is tuned to run on E-85Did you ever do a 1/4 mile run? I have a 19 Raptor and that is fun as hell but not the same as a mustang.