This MBRP exhaust system is great for car enthusiasts who want to boost their Audi's performance. Whether you're driving on a daily commute or taking your car to the track, this exhaust will work wonders. It's made for Audi S3 and RS3 models from 2015 - 2020. The system uses T304 stainless steel tubing that's mandrel bent, with a 3 - inch diameter and a quad split rear exit design.