i had the same problem with my fmic, though it's 2.5" piping. it bumped me back down to about 13 psi from about 18-20, and yes it did hurt my performance a bit. my solution im gonna try in a mbc and see if that can solve my problem. any reason why it shouldnt?

 

I'm thinking you should get smaller piping before trying to cover up a problem with the MBC. Although...I admit, I don't know much about turbo'd cars, so take that advice with a grain of salt.

 

well 2.5" isnt that big it's pretty for all the fmic kit's ive seen, plus i plan on going ko4 soon. so it would be useless to change it now and then change it back

 

Didn't know you were going ko4

 

i switch back and forth between if i wanna go bt or ko4, so who knows