I also have a V6 Sti, check out my build thread :-

http://www.perth-wrx.com/vb/mechanic...under-way.html

I did the 6 speed and Brembo conversion, this cost me from memory $6K and I got $2.5K for my old drive line!

cheers

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Version 6 Sti
6 Speed, brembos, twin scroll and 2.1 stroker
356hp and 471nm ATW