John......i have a spare maf that you can try but i still think it might be plugs....
Can you come upto my house tomorrow and i'll swap it over for you.
the 2004 sti springs won't fit your car....
go fod prodrive,tein or eibach for springs
and as for the other stuff go for whiteline.....you can't beat them
But your car certainly goes well if i do say so.
Thanks for a blast.....giggling away as i plant the pedal.
2.5 is the way forward i think.....zero lag and plenty of ooomph