K&N and all cotton gauze K&N clones suck. Simply hold it up to the light and look how much light they let through. It has been proven time and time again that these type filter do a terrible job at what they are actually intended to do and thats filter the air the engine breaths in. If you can outright see light through the filter which you can with K&N and clones then its not doing its job properly. This has been proven over and over with the use of used oil analysis showing high silicon content from engines equiped with K&N air filters. If you want to wear your engine out faster for a whole extra 1-2hp (thats being optimistic) then by all means be my guest. If you want the best of both worlds then continue reading. Amsoil Ea air filters are the best for both performance and filtering ability that money can buy. They require no oil and they can be blown out and reused. Click this link and near the top you will see a drop down menu. Just drop it down and select air and it will bring up the air filters. https://www.amsoil.com/a/nanofiber-synthetic-oil-filter