ben,
i use uni/finer filter in my 90, always have always will. would you consider doing the same test in one of them? i dont rate K&N at all but the design and materials of the uni are way different to the K&N.
if your interested i can send you my dirty ''in service'' filter and the new change over elements.
the uni has 2 different layers of foam, both have different coarseness levels.
this is what it looked like after 10thou k's and 2 weeks in the vic high country
 
and this is the underside, note a slight discoloration in the center.
 
cheers phil
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