Mahle Rings Performance Gas Nitride Steel 4.015 x .043 .157 RW Plain Ring Set

These Mahle piston rings are made from nitride steel, a material chosen for its improved durability and wear resistance. The 4.015 inch bore size and .043 inch ring thickness are specific dimensions for a precise fit within the cylinder bore. The .157 inch ring width is also a key measurement for proper piston groove seating.

The gas nitride treatment on these rings helps them stand up better to the heat and stress of combustion, which is important for maintaining a good seal between the piston and cylinder wall. This helps prevent blow-by, which is when combustion gases escape past the rings into the crankcase, and also keeps oil from getting into the combustion chamber. This updated ring set is designed for performance applications where a reliable seal is critical.