NPR Piston Ring Set GM DOHC Engines

NPR piston ring sets for GM DOHC engines are made for engine rebuilds and repairs. They are built to seal combustion gases, control oil, and transfer heat from the piston to the cylinder wall. Each set is an engine piston ring set, sometimes called a piston ring kit. The range covers multiple bore and ring-size options.

Key Features:

• Gas sealing: The compression rings keep combustion pressure in the cylinder, which helps maintain power and limits blow-by.
• Oil control: The oil control ring keeps a proper oil film on the cylinder wall. This helps prevent scuffing, excessive wear, and oil consumption.
• Heat transfer: The rings carry heat from the piston to the cylinder wall.
• Quality materials and surface treatments: NPR rings use materials and surface treatments chosen for durability and low friction. These include nitrided and plated steel designs, depending on the application.
• Precision tolerances: Tight manufacturing tolerances are intended for consistent fit and sealing.

About NPR: NPR of America is a wholly owned subsidiary of Nippon Piston Ring Co., Ltd. It has supplied original equipment manufacturers and the aftermarket with internal combustion engine parts since 1973. Choose the correct bore size and ring configuration for your engine. Check ring end gap and piston groove clearances during assembly, as with any engine rebuild.