Completely left field wacky possibility maybe, how plasticcy/secure are the new systems air intake boxes/systems and proximity to highest engine heat like exhaust manifolds?
I honestly have zero knowledge of the Y62 series configuration, just makes me wonder if Outback higher ambient temperatures and heavy bull dust operating temperature hauling hard through the Talcum powder may cause filter cannister lids or the like to flex open slightly and take edge pressure off the filter faces, clutching at straws maybe ?


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