The Track Edition features a 3” inlet complete with an adapter to accommodate the factory downpipe perfectly while leaving an open 3” connection. Featuring minimal filter with one bullet resonator in the center, the Track Edition provides a full-bodied soundtrack at all times.. This configuration provides the best ratio of interior refinement and exterior rumble on the market. No valves needed. Switch driving modes and the exhaust will render the same result as a vavled exhaust. It's the do-it-all exhaust for every day drivers. Comes complete with quad 4.5" slash-cut, double-walled tips in diamond black. The AWE Track Edition for the 8Y S3 is made in the USA and backed by AWE’s Fitment Guarantee, 50 state emissions compliance, No Check Engine Light Guarantee, and the AWE Lifetime Warranty.