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^^Well for one it looks like the K&N uses an oiled filter wherre R2C uses dry.
I didn't know that. S there really any benefit from using a dry versus an oiled filter? I would imagine air flow is improved a little, but filtering is down a little?
R2c filters are the best in the industry. Highest flow/filtration rates. Heck, these guys supply the military with filters for a lot of the larger vehicles. Being dry filters, just use compressed air to clean them.