Today I stumbled across this:
http://www.highflowfuel.com/i-892784...2006-2010.html
Obviously a few unanswered questions, so an email follow up. I suspect our pump is used in other BMW models and this pump is also the one they recommend for the X Challenge. From another site, they are rated at 90LPH and 50 PSI.
Too good to be true?