Ok I put Roush side skirts on my Cobra and to save space under the car we had 30 inch 3.5 glasspacks and dual tips out the side installed. Its LOUD ,dont get me wrong it sounds great at fullthrotle but its drony at 2-3 thousand RPM and I lost some lowend torque. So I wanted to get some opionions on how to quiten it up and get some backpresure back. I was thinking either highflow cats or car chemestry inserts , tell me what you guys(and girls) think.
