At our new EP3 we first dismantled the Mugen Airbox and replaced the Greddy with a stock catback. Then the stock Airbox was modified with a suction funnel and hose. K&N exchange filter is still missing. So Mods:HJS Kat (stock curved, stock catback)Airboxmod (without exchange filter, without Honda tab cutting, only hose + funnel)http://www.tralia.de/Honda/Pruefstand/dyno_hjs_airboxmod.jpg