Use this MagnaFlow exhaust system when you want to enhance your driving experience, whether it's daily commuting or weekend racing. It's perfect for Ford Mustang enthusiasts who want to upgrade their vehicle's performance and sound. The main piping is 2.5 inches in diameter, and the tips are 3.5 inches. It's easy to install, so even DIYers can handle it. With MagnaFlow's warranties, you can be confident in your purchase.