This aFe Takeda Axle - Back Exhaust is perfect for Mazda 3 owners from 2014 to 2018 who want to enhance their car's performance. Whether you're cruising on the highway or hitting the race track, this exhaust will make your driving experience more exciting. The tubing is 2 - 1/2 inches, and the exhaust tips have a 4 - 1/2 - inch diameter. It's suitable for car enthusiasts who are looking for an easy - to - install upgrade that offers more power and a great sound.