This MagnaFlow exhaust system is perfect for Volkswagen owners who love long - distance touring or weekend cruising. It's designed for 1999 - 2005 Volkswagen models with 1.8L or 2.8L engines. The main piping is 2.25 inches, and the tips are 3 inches. It gives your car a great - sounding exhaust note and improves performance. It's easy to install, so you can get back on the road quickly and enjoy a more powerful drive.