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OK, so you want to put keep the old air filters out of the landfill and put mass airflow sensors in there instead?
Once they are contaminated, they're junk.
Unless I see some test results from an independent testing lab, I'm not buying the performance claims either, but for something without a hot-film mass airflow sensor, I don't see a problem with using them.
I've never heard anyone claim the K&N's only create problems if they are "oiled on the wrong side", could be though, but never considered that.
Gilly
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