2018 Audi RS4 B9 2.9TFSI fitted with various upgrade parts in preparation for MTR-STAGE 2. In addition to the Eventuri air intake, HF-Series turbo inlet and Wagner Tuning intercooler kit, the car is fitted with a complete Milltek Sport exhaust system. The downpipes are fitted with 200-cell racing catalysts and the catback is non-resonated while retaining the original exhaust valves.