Mahle Rings Perf Plasma Steel Top Ring 4.160in x 1.0MM .143in RW HVOF Moly Ring Set (48 Qty Bulk Pk)

When you're rebuilding the top end of an engine, especially for performance applications or a heavy-duty overhaul, the piston rings are critical. They seal the combustion chamber, control oil consumption, and transfer heat to the cylinder wall. Mahle's Plasma Steel Top Ring set is built for demanding builds where reliability and performance are key. This bulk pack contains 48 rings, making it ideal for shops working on multiple engines or for large-scale projects.

These top rings feature a plasma-moly coating applied using HVOF (High-Velocity Oxygen Fuel) thermal spray technology. This advanced coating process creates a very dense, well-bonded layer that offers excellent wear resistance and reduces friction. The steel construction provides strength and durability, allowing these rings to handle higher cylinder pressures and temperatures often found in performance or heavy-duty engines. The 1.0mm thickness is a common specification for many performance pistons, and the 4.160-inch bore size is designed for specific engine builds.

Because these are a bulk pack of 48 rings, they are intended for professional use or for engine builders who need a significant quantity. It's important to note that this specific ring set is not CARB approved and cannot be shipped to California. Always refer to your specific engine build requirements and piston manufacturer's recommendations to ensure proper ring selection and installation.