Got my Borla Stinger cat back installed today and it sounds awsome. In case you hadnt read my previouse post I was looking for a cat back which would sound good and loud with the stock H pipe; and the Stinger cat back fit the bill to a tee. My car is actually louder than it was with 2 chamber flows and a Mac Pro Chamber. When they started the car for the first time I couldnt believe how loud it was. Its not the loudest car out there, but considering the fact that it is using the stock H pipe its pretty damn loud. I can only imagine what this cat back sounds like with an off road pipe. I have to give props to Mark at Modular Mustang Racing. He is a great guy, a great tech, and runs a honest operation. If you havent heard of this shop you should check them out at: www.modularmustangracing.com