Use this exhaust system when you want to enhance your 1987 - 1993 Ford Mustang's performance and sound, whether it's for daily driving or weekend racing. It's perfect for Mustang enthusiasts who want to upgrade their ride without breaking the bank. The main piping is 2.5 inches in diameter, and the tips are 3 inches. With an easy - to - install design, you can get it up and running quickly.