MBRP Active Cat-Back Exhaust 2015-2020 Audi S3 (carbon fiber tips)The new Active Cat Back Exhaust from MBRP is a force to be reckoned with. It retains the OEM active exhaust features that your 2015 2020 Audi S3 is equipped with to give you two selectable sound levels. An internal Helmholtz resonator helps reduce drone for a quieter sporty tone and a straight through muffler design in track mode lets your Coyote engine exhale freely. The high flow mufflers increase flow 35 percent over the factory exhaust system and