The STS system is actually designed to be installed cat back. STS actually has the best chance of getting CARB certification and have already done so on several of their kits. I didn't go with STS because they have not done an HR/VHR motor yet.
For those thinking about being the first, here is a C&P from an email I got from them:
Hi Terry, Here is some Video of some of the 350-Z's and G-35's that we have out there..... Enjoy and let me know if you have any questions!!! Thanks,
1.) dead link
2.)
http://www.ststurbo.com/sts_video
3.)
YouTube - STS PROMO
4.)
http://videos.streetfire.net/search/...4e012b0039.htm
5.)
YouTube - g35nyc.com g35 coupe trubo leavein
6.)
YouTube - Daniel's STS Rear Mount Turbo 350z