I would have to dig through the oil filter section to find a reference on the white K&N HP-series that has them at 95% at 20 microns, so take that with a grain of salt.Cool-where did that information come from? Got anything on the black K&N Selects??
I did pull the attached image from K&N in regards to the white K&N HP-series just now putting them at 98% at 30 microns. This is on the HP-2010 (Fram PH2 interchange) and HP-2009 (Fram PH3600 interchange) for my vehicles)
The black K&N Selects list 99% at 30 microns on the product boxes and Walmart.com product description