NPR Piston Ring Set Standard Bore

NPR piston ring sets in standard bore sizing are engine piston rings made for engine rebuilds and performance builds. Rings seal the combustion chamber, control oil on the cylinder wall and move heat from the piston to the cylinder. A fresh ring set helps restore compression and reduce oil consumption. The standard bore sizing is for engines that are not overbored.

Key Features:

• Trusted manufacturer: NPR is the piston ring brand of Nippon Piston Ring Co., Ltd., a Japanese manufacturer founded in 1931. NPR supplies both OEM and aftermarket customers.
• Standard bore sizing: The rings are sized for engine blocks at their original standard bore diameter.
• Engineered ring materials: NPR makes rings in steel and nitrided steel, which are chosen for wear resistance and long service life. Available ring types vary by application.
• Complete ring sets: A set includes the compression and oil control rings for the application.
• Application-specific ring profiles: Ring face widths and thicknesses are matched to the engine design. They range from OEM-spec replacement to performance applications.

Whether you are rebuilding a daily driver, a truck engine or a performance engine, NPR standard bore piston ring sets give you a quality sealing solution. Choose the variant that matches your engine's bore and ring dimensions.