I just purchased a K&N airfilter today and their kind of pricey but I think the quality was worth it. I may have to rejet they said so I just put the airbox lid back on and we'll go from there. :cheers:Hey is there anyone out there that can tell me which port is the vaccum port for the aircut valve so I can block it off? Oh one more thing what are these powernow valves? Do I need one?