scrap the greddy BOV. the stock bov from the evo 9 is better. the springs on the greddy are not sensitive enough. i have about 100 days at the track and the stock 9 bov is best and can handle additional boost. add cams and then tune everything once the parts are in. everytime you mod you need to tune.

 

i've had the type-s greddy and the stock IX and i can say they are both very good. but as long as you adjust the greddy properly and don't single spring mod it, it is just as good driveability wise as the IX and will hold higher boost.

 

Do whats in your budget and go from there.

Mods
APS TBE
BLITZ OPEN TOP KIT
BLITZ EBC
GSC 272I/272E CAMS
AMS INTERCOOLER
AMS LICP
255 LPH
AMS CUSTOM FLASH
319AWHP
290AWTQ
21PSI
93OCT