Just wondering around what gains should I expect...Evo 9 MR, Greddy catback (stock cat converter, no testpipe) Cobb downpipe, Injen intake w/ icp and a good tune 22 PSI. How much would you estimate this would add?

 

there is not really too much to gain on stock fuel pump and injectors. if u r running 22lbs do u have a boost controller or ecu controlled boost?

 

The car will have a boost solenoid and a new MAP sensor as well as the
AEM Uego. I'm thinking around 50-70 HP total? With a good tune and at least 22psi.

 

The power gain will vary, With what you listed I do recommend getting a test pipe; licp, and a ported o2 housing. I've got great results with those and a tune.

 

~280-300wph on a MD on 93.

 

like someone else said, O2 housing, HFC, fuel pump, and IC piping will help. I just installed around the same mods as you. I've got upper and lower IC piping, intake, HFC, O2 housing, dp, and cat back, fuel pump, tune on 93 running 22.5psi and tapering to 20psi.