I've had trouble with K&Ns they first came out too. Had S&Bs in my FE.. One flows better than the other? I'm beginning to wonder how much of that (if true) is at the expense of more dirt dirt coming in.
I also like the horizontal pattern of the K&Ns. They're the only ones that use horizontal pleats.
AND I've discovered the secret to not having your clips pop off
I think they're sold...I'll post again if they're not.