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Features 4 inch diameter filter. Billet Aluminum backing plate with internal breathing passages for super clean installation. Clear Plastic face plate. Internal breathing system - clean installation - No hoses, No oil-catchers, no brackets. Filter is re-usable - simple wash, dry, and re-oil. Compatible with both carburated and fuel injected models. Black anodized polished surface. Don't have to improve the ECU Fitment: 1991-2016 XL SPORTSTER Fits both carburated and fuel injected models Package Included: Featured Performance Filter CNC Machined Backing Plate Plastic Face Plate CNC Machined Breather System Stainless Hardware