I have a 2017 VW Jetta GLI 2.0T with a special 3" turbo exhaust (no cat). For a long time I only had a bright, ultra-quiet resonator to help with the hum, but the car was LOUD and there were very noticeable resonances and vibrations. I put this after the resonator and HOLY S***, what a difference. because it is so short and transparent, but absolutely perfect The workmanship is very good and the Dynomax immediately convinced me as a customer. BUY IT!