http://forums.bimmerforums.com/forum...d.php?t=454142
don't know what kinda dyno you have at school or what correction factor was used but the first 4 guys in that thread and many others had more than just an exhaust and made less power. he might have a little more than just an exhaust. nothing major though.
either way i think you still have him as long as you don't destroy the launch