This MagnaFlow exhaust system is perfect for Mazda 3 Mazdaspeed owners from 2010 to 2013 who want to enhance their driving experience. Whether you're cruising on the highway or showing off at a car meet, it'll make your car sound and perform better. The main piping is 3 inches in diameter, and it has 4 - inch polished double - wall angle - cut rolled - edge tips. It replaces the stock exhaust from near the catalytic converter, giving your car a moderate exterior and mild interior sound level.