The most reasonably priced component used on the Rm250 2003 (k3) Usa (e03) Air Cleaner (model K3/k4/k5/k6) is the Nut.
Parts such as the Air Cleaner (model K3/k4/k5/k6): Filter Assy, Cushion,air Cleaner, Tube,outlet, Collar are included in the Rm250 2003 (k3) Usa (e03) Air Cleaner (model K3/k4/k5/k6) parts fiche.
The Air Cleaner (model K3/k4/k5/k6) is made up of components including this Cleaner Assy,air which is the most expensive.