So, I had a Flowmaster 40 Delta Series installed last weekend. I think it sounds pretty good, but the resonance inside the car between 2,000 and 3,000 rpm is pretty bad. I'm going to try installing some dynomat in the trunk area to see if I can reduce the resonance. If that doesn't work, I'm going to swap out the Flowmaster for a Magnaflow. The first video here is a launch to about 80mph and the second video is a start up followed by some revving. Hopfully the links will work.


http://www.youtube.com/watch?v=RHBDVD2hFBo

http://www.youtube.com/watch?v=o97jxyhNKrM