K & N filters and dirt
Search the internet. There are many reports, including some lab tests, that imply that the reason K & Ns (and some other "performance" filters) pass more air AND more dirt. The other issue is rapid loss of flow capacity with relatively small amounts of dirt trapped.
Combining those two issues keeps me with stock paper filters. There are too many reliable tests (not the amateurs, real lab testing) that confirms the more dirt/less capacity statement.
|