Sprint Filter P037 - The Waterproof Polyester Air Filter Replaces OEM part no. 29331-04 Sprint Filter is Official Technical Supplier of the HRC Repsol Honda Team Official Technical Supplier of Aprilia Racing Official Supplier of Ducati 2020 No cover required - P037 is a special water resistant tissue that prevents rain from entering your engine Designed for bikes with the stock filter cover removed, our Harley filters, combined with our unique P037 ultra-fine, water resistant Dual Sport tissue, offers the most convenient, lowest maintenance, highest performance external air filter solution available. Polyester P037: Filtration: 37 microns - Airflow: 5.000 lit/m2/s - Waterproof: Yes Polyester P08: Filtration: 80 microns - Airflow: 5.050 lit/m2/s - Waterproof: No Polyester P08F1-85: Filtration: 85 microns - Airflow: 15.000 lit/m2/s - Waterproof: Yes Virtually Maintenance Free To clean your Sprint Filter P037, simply remove the filter from the intake, blow it clean with compressed air, and re-attach it. No messy washing, after-market cleaners or oil treatments required, saving you valuable time and money! Long Lifecycle Being man-made, the P037's polyester material will, if properly looked after, display no discernible deterioration or loss of structure or performance over the lifetime of your bike. Build Quality With 60 years of experience in producing air filters, and success at the highest levels of competition (including MotoGP, Moto3 and World SBK), you can be confident in the quality of materials and manufacture of your Sprint Filter P037 air filter. Model compatibility XL1200C Sportster Custom 74CI 2004 - 2013 XL1200L Sportster Low 74CI 2006 - 2011 XL1200N Sportster Nightster 74CI 2007 - 2012 XL1200R Sportster Roadster 74CI 2004 - 2008 XL1200X Forty-Eight 74CI 2010 - 2013 XL50 50TH Anniversary Sportster 74CI 2007 XL883 Sportster 54CI 2004 - 2008 XL883C Sportster Custom 54CI 2004 - 2008 XL883L Sportster Low 54CI 2005 - 2010 XL883L SuperLow 54CI 2011 - 2013 XL883N Iron 54CI 2009 - 2013 XL883R Sportster 54CI 2005 - 2007 XL883R Sportster Roadster 54CI 2012 XLH883 Sportster Custom 54CI 2006