Exhaust systems are critical to turbocharged engines. The MTM 70mm cat-back stainless steel exhaust system, consisting of rear muffler and a specially designed center muffler, is carefully designed and tuned on MTM’s chassis dyno to ensure the exhaust, engine and ECM software work in harmony. The exhaust note is more aggressive but not intrusive, and without the annoying drone present in some aftermarket systems. Includes ECM Software and Exhaust system.