Quote:
Originally Posted by Drifter
K&N filters are fine. They're neither magical nor demonic - they simply offer a different set of compromises than factory filters.
According to independent tests for a GM Duramax application, the K&N drop-in filter traded 3.13% lower filtration efficiency for 27.13% less resistance at 350cfm compared to the AC Delco filter: https://www.nicoclub.com/archives/kn-vs-oem-filter.html
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I'm curious about the "no name" filter in that test. It filters almost as well as OEM, and flows almost as good as the K&N. That looks like a win/win to me!