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Twin Air Pre-Oiled Backfire Air Filter Road Bike Ducati Monster S4/S4R/S4RS/S2R/1000 - DS/620/695/800IE/1000
Twin Air's Original Dual-Stage patented design, high quality materials and superior construction deliver unbeatable performance and protection. Twin Air Filters are the hands-down choice of more World and National Champions than all other filters combined.