The figures I have heard are ~500 CFM. But this is at rated boost,
which is around 12# at the hat. It is rated with a system similar
to the one that turbos use, CFM @ rated boost. You can also
kind of convert it to CFM @ atmospheric, by converting boost
to bars of pressure, 12# would be like 1.8 bar absolute and
then the 500 CFM is multiplied by 1.8 to get CFM @ atmospheric
pressure, which is ~900 CFM. Your inlet tubing and MAF should
be able to flow 900 CFM to properly feed the beast.