The best exhaust setup is one that increases tube diameter for better exhaust gas flow, uses mandrel tube bends for smooth airflow and includes a muffler or resonator to manage unwanted drone while giving you the best-sounding exhaust for a V6 engine. The MRT Street Race Axle Back (Part #92G158) or Sport Touring Midpipe (Part #90G161) is the best exhaust for a 2015-23 Dodge Charger with a 3.6L V6 engine.