Mahle Rings Perf Plasma Moly Steel HV385 Top Ring 4.095in x 1.5MM .151in RW Ring Set (48 Qty Bulk)

This bulk set includes 48 top piston rings from Mahle OE, specifically the HV385 Plasma Moly Steel type. These rings are designed for a 4.095-inch bore and measure 1.5mm thick with a 0.151-inch groove width. They are built with plasma-moly face coatings over a steel core, a well-known combination for improved durability and performance in demanding engine builds. The steel core provides a strong base, while the plasma-moly face offers excellent wear resistance and helps reduce friction against the cylinder wall. This makes them a solid choice for engine rebuilds where reliability and longevity are key.

Mahle OE is a well-known name in the engine component industry, and these rings reflect that reputation. The plasma-moly coating is applied using an advanced process that ensures a consistent and durable surface. This type of coating is particularly effective at handling the heat and stress found in performance or heavy-duty applications. The 1.5mm thickness is a common specification for many performance pistons, and the 0.151-inch groove width ensures compatibility with a wide range of piston designs. Because this is a bulk set of 48 rings, it's ideal for shops or builders working on multiple engines or those who need a significant quantity for a large project.

It's important to note that these rings are not CARB approved and cannot be shipped to California. Always refer to your specific engine build requirements and manufacturer specifications to ensure these rings are the correct fit for your application. Proper installation is crucial for ring seal and engine performance, so consult your engine's service manual for detailed instructions.