I had a RT exhaust with RT package (free compliments of PaCharger) fitted to my 3.5 SXT. The resonators where chopped off. Only complaint with this setup is at WOT it could get a lil ricey. Lo and behold im sitting at a red light and got rear ended:smoke: . The insurance company replaced my exhaust with the Dynomax Cat back system (Part # 19422). This thing is a beast. Nice low rumble at cruising speed. At about 4000rpms the exhaust comes to life. I also have a AEM brute force intake and im really loving the combination. To make a long story short. I have no complaints bout the Dynomax exhaust. And being that i've had an RT exhaust and the Dynomax exhaust, Dynomax wins hands down.