I have a set from Nick Micale at arizona GN. They are way better peices than the stock ones. The fit is incredible. and no leaks or cracks after 6 months of use. I may be selling them because i am building a stage motor with a 4 bolt turbo and would rather not use an adaptor the mount hte turbo.
If you go to his website you can see them, heres the link http://www.arizonagn.com/Headers.htm