Mahle Rings Plasma Moly Steel 1.5MM x .151 RW 4.070in Bore Diameter Moly Ring Set

These Mahle piston rings feature a 1.5mm top ring thickness and a .151 inch second ring thickness, designed for a 4.070 inch bore diameter. They are constructed from plasma moly steel, a strong material known for its durability and resistance to wear, which helps ensure a good seal between the piston and cylinder wall. This type of ring is often chosen for rebuilds where consistent performance and longevity are important.

The plasma moly coating on these rings is a key feature. It's applied to the face of the ring that contacts the cylinder wall, creating a very hard and smooth surface. This helps reduce friction during operation, which can lead to improved engine efficiency and a longer lifespan for both the rings and the cylinder walls. They fit right into the groove on the piston, making them a straightforward replacement part for an engine rebuild.