At the intersection of sophistication and savagery lies the W213 AMG E63/S SwitchPath™ Exhaust. AWE SwitchPath™ Exhaust Technology utilizes strategically placed valves in the exhaust to control tone and volume. Equipped with a valved H-pipe up front and valved resonators in the rear, the AWE SwitchPath™ Exhaust is capable of an attitude adjustment with the press of a button -- sophisticated to savage. There are two options of the SwitchPath™ Exhaust, one for cars that came with the AMG Performance Exhaust (uses factory controls), and one for cars that did not come with the AMG Performance Exhaust. This is the version for cars that came with the AMG Performance Exhaust. Heavy tones for the Mercedes’ heavy hitter, only from AWE.