Audi RS6/RS7 C8 - Non Resonated (Louder) Cat Back System (Twin 80mm) with Polished Oval Trims - OE Requires CuttingDesigned for Customers who will be upgrading to Turbo Back in the Future. From late 2018, many vehicles have been manufactured with a Gasoline Otto Particulate Filter to reduce further the emissions from the vehicle. The Milltek Sport Particulate Filter Back range is designed to compensate for the sound reducing qualities from the particulate filter and significantly improve the sound aesthetic of the exhaust system. All our performance exhaust