Originally Posted by Utah-evo

dont turn up the boost! get a boost controller and set the boost to 20 psi same as stock but it just wont taper in higher rpms. If I was your friend I wouldn't let you touch my car. there are reliability mods that you must do first.
1-do some research
2-boost gauge
3-intake
4-turbo back exhaust
5-boost controller
6-ecu flash (most important) dont even drive till you get tuned
This will put you at about 315awhp and from there you could go a couple different directions depending on what you want to do i recomend cams, fuel pump, intercooler,injectors, o2 housing, that would put you around 350 to the wheels. good luck and check out buschur racing and ams they are the best when it comes to building evos

Originally Posted by ultimatesteve

your shooting your self in the foot if you keep the stock catback on. Also 350whp is very subjective. Here in cali with 91oct and most of the bay area mustang dyno's you wont hit 350whp without a turbo upgrade or race gas. If your on a dynojet dyno with 93-95oct then it shouldnt be a problem but you will need

Turbo back exhaust
test pipe(cat delete)
drop in filter(dont waist your time with a intake at this point)
lower intercooler pipe
cams (GSC s1, hks 272'2 ect just dont go too big)
o2 housing(do it when you do the exhaust/downpipe cause its a pain to install)
evo IX bov(DONT DO A AFTERMARKET BOV)
larger fmic(not needed but helps a bit and usually makes cars less sensative to timing)
AND the most important of them all..........
A good custom duno tune.(this will make more power then any other mod.)