I would probably not even bother with the intake and exhaust and just go with a BBK. I did not realize how big of a difference my BBK made until I rode my friends Z125 last night that had an intake and full exhaust. The difference between my bike and his was night and day! It was not even close. I am running stock exhaust because I like my bikes quiet with stock intake. It's not that much more to buy the BBK and head instead of a pipe and an intake.