Originally Posted by chazly413
You can look at cams, headers, and a tune to get you around stock WRX levels. Beyond that, you're looking at much more extensive modification.
You should still do headers (a good equal length, **** the sound, power is what counts) as that will give you your largest bolt on performance gain. Then, go crazy with handling mods.
Really it is that easy man i better get those rallitek cams, oh and that TWE EL header and get it tuned by EFI
OP do not listen to posts of the above variety YOU WILL NEVER GET CLOSE TO WRX numbers with cams headers and a tune you might get 150 at the wheels and that is an exaggeration. The sounds is your choice
EL or UEL it really doesnt matter you cant take more air out of an engine that the intake valves allow in on the exhaust stroke.
The only big power N/A wise you might make is from a EZ30R or a EZ36R now those two platforms have real potential. Anyway trade your 2.5i for a WRX or a Legacy GT or a STi or an older RS and swap it.
But in the mean time get suspension parts