[mjlaupp]

I have a K&N air filter on my Trooper and the MINI. The main reason I installed them is because finding replacement paper filters for these vehicles in my area is next to impossible.

I have not noticed any substantial increase in performance other than what is realized by changing out a dirty filter for a clean one. However, I did not do any dino testing to confirm or deny the mfg claims.

The biggest advantage is that I am not throwing paper filters into the dump and I don't have to run all over town looking for a filter or an oil change place that has the right filter.

I may install a K&N on the F250 since I have the cleaning kit in hand. It takes about 4 paper filter changes to find the break even point for the installation of a K&N and the purchase of a cleaning kit.

I can not comment on the installation of a K&N Fresh Air Filter Kit.