Yep I have them on my 08 GSA along with a Remus end can and K + N Filter. The pipes are OK not as perfect as Remus headers but then they are a great deal cheeper and do the same job. The clamps provided are cheep ugly things and so I bought some Stainless ones but you need two either side in order to close the slots. Sounds great but along with the Remus end can when your on it the poping on over run is some poping. Not to everyones taste but me I think thats what a twin is about. I also contacted the guy (nice fella) and asked if he would send a set outside of E-Bay to avoid costs and got them for 150. Yep I know thats not in the spirit of E-Bay but then a tennar is a tennar and ten tennars is a a ton etc etc
All the above of course IMHO