This axle back exhaust will give your Mustang the deep muscle car sound. Not only do you get the deep aggresive sound, you will also achieve increased Horsepower via our less restrictive system. Many inexpensive light weight systems use 22 gauge Stainless, not us; ours is checked to be between 16 to 18 gauge to assure the ability to weld if so desired (but not required). Our 304 SUS does not yellow or change colors easily like the 409 that is less expensive.