University of Swansea made only the airflow test and pictures at electronic mycroscope and measured holes of each air filter. Read the total test here: https://issuu.com/sprintfilter/docs/...76f1b38/13?e=0
We support from many years 80% of MotoGP, Moto3, WSBK (World SBK), FIM Superstock 1000 Racing Teams. Our filters stop dust also into the Losail Circuit (Qatar).
We hope that these infos are enough for you, at the moment.......
Did the magazine article give any data on the effectiveness of the various filters at stopping the crap getting through?
This is MUCH more important on an H2 because the supercharger impeller is right after the filter. Grit, or anything else, will erode the rotor tips causing very expensive damage.