those thing i did first:
Big down pipe, 3,5inc.
Hole exhause whitaout cat, and one muffler, the muffler in back. 3,5inc.
On the turbo i got better flow in to it, bigger kompressor hole.
Kn, biggest podfilter.
electric fan, wisko in the trasch.
acc pump in the tracsh whit the cooler cell pakedge. (Spells?!)
Big custom made intercooler from a truck, 10cm thick, take out all space in front.
Unshoure whats the effect was on that modds??! but it was a big diffrent.
Thats it, what i had to do first, but it is not gonna end, if u once start to take out power, u will never stop doing that =))
regards and good luck dude.
Regards Klas