I have had several PMs regarding the exhaust set up. So here it is. Very simple and possibly the most cost effective for a full cat(primary) back setup
X-Pipe 2ndary Catbypass Pipe with Resonators. The first one I ordered came in with a slight dent preventing a clean connection with the primary cats....they replaced and shipped overnight then followed up with a call to verify that all was good with the new part. Awesome service there at Fabspeed. I also have had there full exhaust setup on my 996 turbo which was simply ridiculous!
http://www.fabspeed.com/BMW.html
Blue Titanium tip Axle Back Exhaust(This thing weighs next to nothing) Extremely impressed by the quality of the welds etc on this.
http://www.meganracingexhaust.com/ax...-ABE-BE92M3-BT
Intake is a Macht Schnell
http://www.machtschnell.com/product/...rge-kit-e9x-m3
Next in line are some custom primary cat delete "test" pipes with exhaust cutouts for those occasions when I want it to make some real noise
A little less than $2K for the whole setup including installation and some welding on two of the exhaust couplings.l I am all about getting the best bang and performance for the buck, I could care less about who manufactures it names etc, that's all vanity shit! Just my .02