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Namura Replacement Piston Rings - 66.97mm - NA-30000-4R 2003 Bombardier Outlander 400 HO XT 2009-11 Harley-Davidson Road King ClassicNamura Technologies Piston Ring Kit Piston Rings are an essential part of piston performance, engine efficiency and durability Namuras rings are designed specifically for each application with the best materials and precise fitment Composed of either a highly ductile cast iron or stainless steel alloy Quality rings provide excellent wear resistance and a gas tight seal Sold with enough rings for a single piston Made in Taiwan Often overlooked and