This MagnaFlow exhaust system is perfect for Mazda 3 owners from 2010 - 2013 who want to enhance their driving experience. Whether you're cruising on the highway or sitting at a stoplight, it will make your car stand out. The main piping is 2.5 inches, and the exhaust tips are 4 inches in size. It's easy to install on your own, so you don't have to spend extra time and money at a mechanic.