Mahle Rings Performance Plasma Steel Top Ring 3.791in x 1.0MM .143in RW HVOF Moly Ring Set

These Mahle OE piston rings feature a plasma-sprayed steel top ring, a tough coating applied using High-Velocity Oxygen Fuel (HVOF) thermal spray technology. This advanced surface treatment is designed to handle the heat and friction found in performance applications, offering improved durability and a better seal against the cylinder wall. The rings are precisely sized at 3.791 inches in bore diameter with a 1.0mm top ring groove and a 0.143-inch ring thickness, ensuring a proper fit in many performance engine builds.

The molybdenum (moly) coating on the ring face further enhances its wear resistance and reduces friction, contributing to a more efficient combustion process and longer ring life. This well-built ring set is a popular choice for engine rebuilds where a reliable and durable piston ring is essential for optimal performance and compression. They are designed to work effectively within the specified cylinder bore, helping to maintain proper oil control and prevent blow-by.