Alright peeps. What do I do with the pipes that normally go to the airbox as I have replaced it with a k&n.

 

I presume this is a carb' model or EFI? It is possible to obtain a further K&N filter for the crank case breather system - it is a round type filter about 7cm in diameter and you plug in the breather pipes to the new filter using jubilee clip. I have seen the breather pipe redirected to a can on some cars but it will mist oil into your engine bay.