The Namura NA-50026R Piston Ring Set is an application-specific engine component for Polaris Hawkeye 400 HO 2x4. It is designed for the verified year, make and model combinations listed below. Key Features Application-specific ring set designed for the listed piston and bore size Compression-ring materials and coatings are selected for wear resistance and sealing Confirm piston compatibility and any oversize specification before ordering Manufacturer: NamuraPart Number: NA-50026R Vehicle Fitment Year Make Model 2011-2014 Polaris Hawkeye 400 HO 2x4 2004-2005 Polaris Ranger 400 2x4/4x4/6x6 2010-2014 Polaris Ranger 400 4x4 2001-2005 Polaris Sportsman 400 2008-2014 Polaris Sportsman 400 HO 2006-2007 Polaris Sportsman 450 Fitment note: Match the year, make, model and any listed specifications to your machine before ordering. Professional installation is recommended for internal engine components. Shipping & Returns Most orders process within 1 business day. 30-day returns on new, unused items.