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I swap mine out with a OEM style paper elementment (2017) every 6 months.
I also clean it every month by tapping it out.
They are a cheap maintenance replacement part.
It is dusty here.
Non OEM style replacement filters are a gimmick in my opinion, plus the oiled variety clog up extremely quick, the OEM filter in my NA 86 is not a restriction and it actually filters out fine dust and stays quite efficient over time.
Opinions may vary.
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