AWE Touring Edition Exhaust for Audi C7 A7 3.0T - Quad Outlet, Chrome Silver Tips3015 42074 Sound Perfection: AWE Tuning 180 Technology The tone that was accomplished for the A7 is due in part to AWE Tunings 180 Technology. As exhaust gases exit the 3. 0T engine and flow into an AWE Tuning 180 Technology equipped resonator, they pass through strategically located ports, and into reflection chambers. Sound waves, carried by these exhaust gasses, bounce off the walls of the reflection chambers. By controlling the size and location