I prefer the K & N with the nut ....just a pleasant convenience for oil change time. I also like the seal design.....no leaks. I have had problems with drippy minor leaks with other aftermarket filters depite all efforts and methods to preclude same. (lubricating the seat etc)
No problems with the OEM or the K & N though. I hand tighen it till its gudentight and then appy tool to the nut and a half to a three quarter turn and its easy off as well.
