I will never own another mustang with turn downs in front of the axle. I have tailpipes on my mustang and still smell like exhaust. Im actually putting cats back on my car to try and clean it up. It really makes no sense to run without cats. The new design cats dont cut power. It was proven by Muscle Mustang Fast Ford on a supercharged cobra. All we do is dump lots of unburned fuel out the tailpipes without cats. This makes your girlfriend not want to ride with you in your mustang. No matter how much money you got in it or how cool it looks. They dont care about that. They dont want their hair smelling like fumes. I love Women much more than 5 hp in a mustang.