I was running the "race" version, but seriously this one has more air flow than any bike will gobble up thru any throttle bodies. No reason to risk extra particles thru the engine as there is no way the engine can utilize more air anyway. Maybe a modified race only bike but I think those are rebuilt constantly. This is way enough for performance street, I have a full yosh pipe, air box mod, and with ecu editor was dyno'd at above factory specs at the wheel not crank so that's gains for sure! Better power curve as well. More air flow not needed this is probably overkill even "reg" BMC version but just in case the OEM paper restricts this is a good choice.