Quote Originally Posted by anandoc View Post
Nope, both my resonators are intact. I thought I would wait to see what the exhaust swap sounds like...and maybe I can remove the resonator later if required. Sounds like I am going to keep my resonators. Oh and I have the 2.5" version (Vibrant 1148).
Hmmm, I don't know much about fluid dynamics, but could the smaller inlet maybe cause the droning, verses the 3" inlet?

What I did on the BRZ was add additional sound mating. Its an extra step, yes, but it also cut down road noise dramatically. I used this product:
http://www.protectowrap.com/flashing.../bt20xl-butyl/

It works great because its only 4" wide and is very flexible. This company makes an audio sound mat, which is made form the same material in hte product I posted. Only difference is that it is twice as thick and cost 2 to 4 times more depending where you go to buy it. I wish I had the photos of my BRZ to show you.

Some strips on the trunk floor and along the trans / drive shaft tunnel would make a big difference