Billy Boat Performance Exhaust has just released a line of performance exhaust for the 2.0T MK6 Volkswagon GTI that incorporates the latest in resonance control technology, B&B's proprietary Purge Resonance Technology or PRT as it is known. Completely reengineered the PRT system allows you to have a mild exhaust note at cruising speeds yet a forceful note on aggressive driving. The complex yet simple design gives you the increased sound and performance you are looking for with its straight through design on moderate to hard acceleration and then the unique purge chambers cancel out the unwanted interior noise during low rpm cruising speeds.