so i know i talked about this with Z28ricer and hillbilly drifter... but i forgot exact what was said...

i have an opprotunity to buy the S15 Spec R comp and exh housings and CS water and oil lines for $120 shipped, the question is i know a S14 comp housing bolts on... what about the S15? i know they're the same but i don't know if the wheel profiles are different and i'm worried about buying the housings and them not fitting....

and exactly how much more flow/power will i get out of "upgrading" the comp housing?

yes i've searched... and i come here cause we seem to have some GTIR turbo experts here...