Nik,

You want quality AND proven performance then follow this.......

http://www.rexnet.com.au/forum/index...howtopic=58831

Do look at Michael South's Exhaust webpage.

http://www.msengineering.com.au/exhaustsystems.html

Pay particular attention to the splitter in the dump pipe.
Also a 2.5" diff back will give you surprising performance gains too. The design of this diff back is very important.

RMS/MMS can do the splitter if you want to go quality local stuff.

J