Mahle Rings Performance Plasma Steel Top Ring 4.075in x 1.0MM .143in RW HVOF Moly Ring Set

This is a Mahle OE Performance Plasma Steel Top Ring Set, part number 3011128. These rings are designed for performance applications and feature a plasma-moly coating on the top ring for improved durability and reduced friction. The 4.075-inch bore size and 1.0mm top ring width are common specifications for many performance engine builds.

The plasma-moly coating, applied using HVOF (High-Velocity Oxygen Fuel) thermal spray, creates a very hard and wear-resistant surface on the top ring. This helps the ring maintain its seal against the cylinder wall under high combustion pressures and temperatures, which is crucial for performance engines. The steel construction also offers good strength and heat resistance.

Please note that this ring set is not CARB approved and cannot be shipped to California. Always consult your engine builder or service manual for proper installation procedures and specifications.