Have to ask this one more time (last time was in another thread). Why go with a K&N filter since oil filters are notorious for not filtering the small particles out as good as a good paper element? Thus, if off-roading in a sandy area, there is the likelihood of increase fine particles entering the engine.
In addition, two-years ago, a bunch of us proved on Corvettes at a Dyno in Smyrna TN, that a straight replacement of a stock filter with a K&N did not increase the HP of the engine. (This does not include ram air intake systems using K&N, Blackwing, etc., oil coated air filters.)
I do know they can allow for more acceleration noise, and that is about all.
So, I'm just curious.
(Note for some information on testing of oil versus paper filters, one good place is:
Bob the Oil Guy - Sounds weird, but quite reputable and does a good job.
http://www.bobistheoilguy.com/airfilter/airtest1.htm
For other places, search the internet. I have personally seen the test results done by GM on these types of filters.)