I'm already running an X-pipe and there really isn't any room in the front for a resonator. That was the first thing I mentioned to the muffler guy when I brought the car in.The exhaust is too close to the body and transmission. Heck, I'm even rubbing in a couple of spots. Anyway, the diameter of the smallest resonators that I could find was 4" as shown in my links above.
What is keeping you from fixing the rubbing? Touching exhaust can make an enormous amount of noise.
The header was rubbing against the PS box and the exhaust pipe was hitting the T-bar. Since then I got new T-bars and I haven't looked at it. I am more timid working on the front of the car than the rear. Just dealing with more weight (engine). I never feel comfortable working with it alone.
