Agreed. I have replaced many MAF because of non oem filters that either come apart or deposit the oil on the sensor element. I don't think you need to worry about the filter... yeah the K&N will flow more air, per cubic inch, but the stock filter is big enough to flow more than enough air for the engine...
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2007 GS 450h-Active Stabilizer/Radar cruise
1994 L Blue 3.70 VTD
ASE Master Automobile
ASE Advanced Level Specialist
Toyota Master Diagnostic Technician (former life)
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