I did the same thing except I removed the rear mufflers and let the resonator in. I had the same problem where it was getting very annoying so I went back and installed two of these small glass packs. The car sounds very nice and not to loud on the inside but on the outside sounds very nice. By the way I have the l6. Hope this help.

Valentin

These are the glass packs I installed:
http://static.summitracing.com/globa...sum-630810.jpg