Hey guys -
I have a OEM cat-back for an E90 with the 'style-1' mod performed. The top of the can was opened up at the absorption chambers and 2 of the 4 perforated pipes were replaced with strait pipes. Can was then welded on the top. This is not visible at all when installed. Exhaust still flows through the Helmholtz chambers this is not the strait pipe method.
Looking to trade it for a stock cat-back and a little cash maybe.
Sounds amazing with no drone in the cabin. I ended up doing a full header-back system. Vastano recently had his done as well and would vouch for the sound!
I am located near Atlanta and the exhaust is off the car. Remember this is for an E90 and won't match up properly with an E92.