K&N Performance Air Filter Problem

[RustyJoe]

Originally Posted by Half_Baked

You're going to have a worse time if it fits. Aftermarket performance filters don't stand up at all well to independent testing. They block faster, flow less and filter less effectively than OEM.

Source:

http://www.nicoclub.com/archives/kn-vs-oem-filter.html

There are other less direct reports and plenty of car clubs where people have used aftermarket filters then found their MPG dropping noticeably.

I discovered this after taking my induction system apart on an old MR2 and finding it filthy inside. The OEM filter keeps it pristine.

Personally I'd take it back and call it a near miss. :)

Yeah, turned out Auto Zone was wrong(obviously). I ended up getting the stock air filter for $12.

Thanks for the advice all!