Sometime ago, Sept. 16th I believe, a poster named ChrisG35C posted some info and pics on a new G coupe prototype exhaust. Search "Brullen" to find original thread. After waiting in vain for additional info, I finally called Brullen and this is what I found out. They custom make each stainless system with an X-pipe located in the forward resonator. Separate dual mufflers in the rear. Options include3.0, 3.5, or 4.0 inch tips. Straight or angle cut. " Loud or Quiet" system offered. Richard Garcia, the guy I talked to Up there, said most people get the quiet system meaning louder than stock, but not annoying drone at highway speeds. They are taking orders on a group buy that will run Dec. 1st till Jan. 9th upon which they will start building and shipping systems.Pricing is 1300CDN or 1002US plus shipping. The group buy price is 1150CDN or 895 US. A polished muffler option is 40CDN each or 30US. I did conversion myself, so check with Richard or Alex on the US price. I think they did a dyno using a Borla equipped car as a baseline and managed to beat it a few horsepower. Again check with them for additional details I might have forgotten. 1-888-278-5536. Also you can go online at brullenexhaust.com to see other systems they make and their options explained. Every body has different wants, but this system seems to have all mine covered and I am definately getting one myself.