1' F20 LCI (09/2015 06/2019). 1' F21 LCI (09/2015 06/2019). Excellent, sporty sound exterior and interior. Reduced exhaust back pressure. Unique look thanks to a chrome-plated stainless steel design. The thermally decoupled tailpipe and the built-in internal funnel achieve a significantly higher quality of the overall concept. All parts are made of high quality