Use this exhaust system when you want to enhance your driving experience, whether it's on the track or daily commuting. It's perfect for BMW Z4 M Coupe and Roadster owners from 2006 - 2008 who want to boost their car's performance and style. The system features 2 - 1/2' 304 stainless steel tubing and quad 3' diameter polished stainless steel tips. It's easy to install and gives your car a unique look and sound.