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NPR Performance Piston Rings

Jun 29, 2023

NPR of America, Inc. (NOA) a division of Nippon Piston Rings Co. Ltd, has announced an expanded range of high-performance piston ring sets for Ford, GM and Chrysler V8 engines. A total of 28 bore diameters are now available in the three series – GNHD, GNHM and GNHS – available for American V8 engines. Each series represent different size ring packs.

"Expanding the range of available bore diameters for our performance rings for V8 engines gives our customers more options and make our rings available for more pistons," said Romy Laxamana, General Manager at NPR of America. Each 8-cylinder piston ring set contains steel gas-nitrided top rings for maximum performance and durability. To learn more about NPR performance rings and other products, visit