I think the Racing Medallion is really loud, personally. I have also heard the EVO, and to tell you the truth, I am not at all impressed with that either. I have Tanabe, but mine is the G Power Medallion. It has some decent horsepower gains, and it doesn't have the obnoxious sound that you hear all over the place. It is actually fairly quiet at low RPM's. It is really low and deep, but you definitely can hear it at about 3500. Not a weedwacker sound, but a nice deep sound, like exhaust should be!! :ghey: