I just installed the iON turbo-back exhaust 2 weekends ago. I took the fans, radiator, piping and all out. Then I removed the exhaust manifold and turbo. I enclosed a couple pics for you. BE CAREFUL when you remove and install the old and new downpipe. I broke off 2 studs. I don't think Mazda or Callaway or whoever put the pieces together used any anti-sieze compound on it. Anyway, with the exception of that, it wasn't too hard. Good luck to you.
Allen-