This MagnaFlow exhaust system is perfect for BMW enthusiasts who love taking their cars on long grand tours or weekend cruises. It fits 2001 - 2006 BMW 330Ci and 2001 - 2005 BMW 330i base models with 3.0L engines. The main piping is 2.5 inches in diameter and has a mandrel - bent design. The exhaust terminates in a dual straight driver - side rear exit with 3 - inch polished welded - on double - wall angle - cut rolled - edge tips. It offers a moderate exterior and mild interior sound level, enhancing your driving pleasure.