AWE Tuning Track-to-Touring Conversion Kit for 17+ Challenger - Stock Tips (3820-11042)Swaps your existing straight through Track Edition rear sections with AWE's straight through, patented drone canceling 180 Technology resonators. 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 chambers. Sound waves, carried by these exhaust gasses, bounce off the walls of the