i put down 320 @ 23-24 psi on my 03 a while ago, i lowered the boost to 20-21 so im not Im not making that power anymore im sure. Im gonna make one last run to the dyno i hope. Im looking to get 350whp @ 21psi.
What is it gonna take me to get that additional hp. ii prob only have 300 at 20 psi meaning i need about another 50whp

i have injen intake w upper ic pipe.
full exhaust, catless
hallman mbc

Besides cams which im getting what is the best thing price vs. hp to do now

 

Search.

 

if you don't already have it, downpipe, O2 housing, tune, ported and coated manifold, and lower intercooler pipe. Then with cams you should be able to pull 350 on a dynojet.

 

Get nice tires.