Use this exhaust system when you want to enhance your driving experience, whether it's daily commuting or weekend cruising. It's perfect for car enthusiasts who love a sporty look and sound. The main piping is 3 inches in diameter, and the tips are 4 inches with a polished double - wall angle - cut rolled edge design. It can be easily installed on 1998 - 2002 Chevrolet Camaro Z28, Z28 SS, and Pontiac Firebird Formula, Trans Am models.