Namura Technologies NA-50003-2R OEM Style Piston Rings Oversize - 020

The Namura Technologies NA-50003-2R is a precision-engineered piston ring set designed as a direct OEM replacement for select Polaris ATV applications. This .020 oversize ring set is ideal for cylinder rebuilds that have been bored to accommodate wear or damage.

Key Features:

• Manufactured by Riken, the world's largest OEM piston ring manufacturer
• .020" (.50mm) oversize for rebored cylinders
• Compatible with OEM pistons for versatile rebuild options
• Composed of highly ductile cast iron or stainless steel alloy for excellent wear resistance
• Features chrome, phosphate, or nitride coatings for enhanced durability
• Provides a gastight seal for optimal compression and engine performance
• Designed specifically for powersports applications

Namura piston rings are engineered to meet or exceed OEM specifications, making them an excellent choice for engine rebuilds, repairs, or performance upgrades. These rings help extend the life of expensive cylinder sleeves including Nikasil, SCEM, Boron Composite, and Ceramic finishes. Each ring set is precision-manufactured to ensure proper ring end gap and optimal sealing performance.