AWE Tuning Track-to-Touring Conversion Kit for B9 A4 A5 (3815-31002)Tired of drone but still want the full bodied tone of the Track Edition? Convert your existing AWE Track Edition Cat Back into a Touring Edition by equipping 180 Technology axlebacks in place of the Track Edition straight sections. AWE's patented 180 Technology works a little something like this: As exhaust gases exit the engine and flow into an AWE 180 Technology equipped resonator, they pass through strategically located ports, and into reflection