Here are some photos (and a teaser video) of a 2018 Mercedes C63S AMG we installed an AWE Track Edition Exhaust on (P/N 3020-31020). The Track Edition exhaust uses 3" mandrel bent T304 stainless steel throughout and bolts right up to the factory connections. It is essentially two straight pipes so it makes for a very raw sound. Since there are no mufflers, the exhaust weighs quite a bit less than the stock unit.
This exhaust system reuses the factory exhaust tips for a stock look but with much more aggressive sound. For AMG Performance exhaust equipped cars, the valve simulators (P/N: 1310-11018) are required. Without this part, the ECU will cut power quite significantly (25-40%). AWE claims max power gains of 19 hp and 26 ft-lbs of torque at the crank with their exhaust systems.