just out of interest heres a pair of filters I have on hand,Ive never used a ryco one on the honda but are a big aussie brand here,use em all the time on cars,I thought Ide take a closer look at them,the ryco has more pleats,but the internal slots look more restrictive and there also seems to be a wide seam join with no slots in it,the MIW ones Ive used before,dont see how its multi stage?has less pleats but I think a better internal free flowing steel centre compared to the ryco?the ryco might filter better but hamper flow?itll need a proper set up pressure flow test to find out,I tried blocking one end and blowing through them both couldnt tell any difference.