if you ve got a 1 litre buy a kn panel filter i had 1 litre with kn cone and it made alot of noise but did nt produce any more power so if you want mental noise any cone will do
i was told to keep the standard "air box" cause it houses alot of air, and just repalce the "panel filter". i was told not to get a cone. its actually hard to install a cone without it getting some hot air from manifold :-( thanks