Originally Posted by
GraphiteGhost

PLUS, an additional down side. IF you over-oil them after cleaning (tricky because you have no idea what the correct amount is) and the engine ingests some of it, it'll ruin at least the MAF sensor (so I've been told).

Not sure if that MAF sensor can be adequately cleaned afterwards (I've been told a big NO, it's ruined)...
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Ordered a used Engine top cover to replace my Crossfire cover with a minor crack. Used cover had K&N filters inside. Ordered K&N cleaner kit and cleaned them, but noted some comments online regarding MAK issues and engine running lean errors. I will stay with OEM filters. Clearer kit had new oil spray but it would be easy to over oil the filters.. 2005 Crossfire roadster bought last September, 2023 and love it. Wally Burlingham