Quote:

...Both K&N and Unifilter air filters have been suggested. Any difference? One better than the other?




What's your definition of "better"?

The UP4229's cost less, flow better, & don't hit the frame. I've tried both the Unis & K&N's, & "flow" was confirmed via on-board A/F meter. The Unis were less restictive.

My Uni's are single-stage black foam. My K&N's have chrome end caps and are cotton fabric.

I think the K&N's look better. I don't recall the K&N model numbers off-hand, but they are in the Tech Vault.