UNI Foam Air Filter & HMF Brushed Performance-Series Full System Exhaust Turn-Down-Black for Yamaha Raptor 250 2008-2010Kit Includes: 1 HMF Performance-Series Full System Exhaust Brushed, 1 Uni Filter Foam Air FilterHMF Performance-Series Full System Exhaust BrushedColor: BrushedShape: RoundMount: SideEnd Cap: Turn-Down-BlackUni Filter Foam Air FilterUni Foam Air Filters use polyurethane foam as the filtration media because of it's superior dirt capturing abilities. The principle of how foam air filters work is simple: 'Open Cell' Polyurethane Foam is wetted with specially developed filter oil. The 'sticky' filter oil is suspended in the path of the dirty air making it impossible for dirt to pass through the depth of the filter.
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