NPR 10-904-2 Piston Ring Set 0.50mm Oversize

The NPR 10-904-2 is a precision-engineered piston ring set manufactured by Nippon Piston Ring (NPR), a leading supplier of OEM-quality engine components. This ring set features NPR's advanced high-alloy steel construction, offering superior durability and performance compared to traditional cast iron rings.

Key Features:

• High-alloy steel construction for enhanced strength and wear resistance
• 0.50mm oversize specification for rebuilt engines with machined cylinders
• Premium surface treatment for optimal sealing and reduced friction
• Reduced ring thickness design for improved conformability to cylinder walls
• Over 60% reduction in ring wear compared to conventional designs
• Superior blow-by control and oil economy

NPR piston rings are manufactured to strict Japanese Industrial Standards (JIS) and are trusted by major automotive manufacturers worldwide. The steel ring construction provides higher tensile strength, greater fatigue life, and better stress resistance than cast iron alternatives, resulting in extended service life and improved engine performance.