K&N's Custom Assembly Filter Kit utilizes a flow tested billet adapter that is mounted directly to the air box. The universal clamp on air filter then attaches to the billet adapter. The large mounting surface for the clamp-on air filter provides better stability during rigorous riding. The smooth billet adapter was flow tested and dyno proven to improve performance and acts as a velocity stack within the air box. K&N's Custom Assembly Filter Kit, like all K&N air filters, is designed to provide excellent filtration and optimum air flow. |