Aftermarket Drop in Air filter performance

[WildHorse]

7 whp / 7 wft-lb gain? Pretty good for just a air filter. Crazy how Lexus picked up 23 whp.

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[Performance nut]

I have run KHN filters for years on many cars. I honestly dont see a difference in filtration versus Frams and the like. And I have lived in some dusty areas. My old Mazda I put over 100k on a K&N. And when I sold it, the only good part was the engine.