Hi guys looking for a full exhuast system for my 2003 sti with ppp and simtek ecu i know i will need the ecu remapping so going to but one part of exhuast a month and save up for fitting and remap

after

unequal manifold
turbo uppie
sports cat
then just stright through to a decent sounding backbox
keeping it at 2.5 inch i think is best as im running 340bhp so think 3 will be over kill?

Cheers