NPR 10-745-2 Piston and Ring Kit +0.50mm Oversize

The NPR 10-745-2 is a complete piston and ring kit in a +0.50mm oversize bore specification, manufactured by Nippon Piston Ring (NPR) — one of the world's leading OEM and aftermarket engine component suppliers. NPR's "10-" prefix part numbering designates a complete piston and ring kit containing all pistons and rings required for a full engine rebuild.

NPR piston rings are engineered to seal combustion gases, regulate lubricating oil, transfer heat away from the piston, and prevent wear and seizure under demanding operating conditions. Each ring set is developed through extensive bench and engine testing in cooperation with original equipment manufacturers to ensure a precise match to factory specifications.

Kit Contents:

• Piston pins and retainer clips included
• Top compression rings, second compression rings, and oil control ring sets for all cylinders

Key Features:

• +0.50mm oversize bore for use with cylinder bores that have been honed or machined to 0.50mm over standard dimensions
• Rings manufactured to JIS (Japanese Industrial Standard) B8032-6-1998
• Surface treatments including chrome plating, nitriding, and/or PVD coating depending on ring position and application
• Steel ring construction where applicable offers higher tensile strength, greater fatigue life, reduced side wear, and superior oil economy compared to cast iron alternatives
• Pistons may feature molybdenum-coated skirts and/or anodized heads for enhanced durability and reduced cylinder wall clearance requirements

The NPR 10-745-2 is the ideal choice for engine rebuilders seeking OEM-quality components with the precision engineering that NPR has delivered to the automotive industry since 1973.