## Namura NA-40008R Piston Rings 84.42mm - Reliability and Performance Often overlooked, piston rings play a crucial role in ensuring optimal engine performance, efficiency, and durability. The Namura NA-40008R, with a diameter of 84.42mm, guarantees top quality and precision, designed for demanding motorcycle and scooter users. ### Highest Quality Materials Namura is renowned for its attention to material selection. The NA-40008R rings are made of highly durable alloys, resistant to wear and providing a tight seal. Both ductile iron and stainless steel, used in the manufacturing process, guarantee long life and reliability. ### Precise Fit The design of the Namura NA-40008R rings takes into account the specifics of the cylinder liner, its coating, as well as the size and stroke of the engine (2 or 4 stroke). This precise fit to specific operating conditions translates into optimal performance and minimized energy loss. ### Advanced Technologies Depending on the model, Namura NA-40008R rings can be enhanced with special coatings such as chrome, phosphate, or nitride. These advanced technologies further increase resistance to wear, corrosion, and high temperatures, ensuring trouble-free engine operation in all conditions. ### Compression Rings Made of highly ductile cast iron or stainless steel alloy, the compression rings provide excellent sealing and minimize compression losses. Additional coatings, such as chrome, phosphate, or nitride, increase their durability and resistance to extreme operating conditions. ### Oil Rings The oil ring set consists of three components: two scraper rings made of ductile iron or stainless steel, and one expander ring made of stainless steel. Chrome, nitride, or phosphate coatings further protect against wear and corrosion, ensuring effective lubrication and removal of excess oil.