K&N

[snowy]

Air filters.....................................
Is a K&N worth it? 
I know for long term ownership it costs in with cleaning instead of replacement, but is there any benefit noted with supposed better breathing? Any running / mapping issues?
Pipercross seem another used alternative, but washing and oiling foam filters....... ......moved on from that, unless they are well received?
Thoughts appreciated please.

[O.C.]

I've used K&N in the past and always found them to be a good product

Can't say that I have any experience of Pipercross   

[shaggs147]

I have the pipercross, and I found it improved the engine running.  The throttle used to be hesitant at roundabouts and junctions etc, but its almost unnoticeable now. I doubt if it would work for everyone though.

[virginiajim]

I've stopped running K&Ns.  There's a reason they flow more air...   They don't filter as well.  I used to run them in my vehicles as well.  Got rid of them.  They flow more air because they don't filter it as well.  Vehicles that I ran them on used more oil.  Now I will say that I haven't noticed that on the C14 but on the cars I have.  I'm sticking with proper paper filters now.  And you know, I don't miss that gigantic boost of HP I got from them.