I took my k+N off as it was making me drive like a idiot, so I think Im gonna get either a k+n filter or pipercross if someone can help me find. I have no petrol at the moment so I havent driven it anywhere yet but I will be going to Nottingham tonight.
seems to be a bit more throaty but I doubt not more effcient till I buy a K+N filter/pipercross one.