Mahle Rings Perf Plasma Steel Top Ring 4.260in x 1.0MM .143in RW HVOF Moly Ring Set (48 Qty Bulk Pk)

Mahle OE performance steel top piston rings are built for demanding engine builds. These rings are designed for a 4.260-inch bore and feature a 1.0mm thickness with a 3/16-inch ring groove. The plasma-sprayed steel construction offers improved durability and wear resistance compared to cast iron, making them a solid choice for performance applications where reliability is key.

The top ring utilizes a High Velocity Oxy-Fuel (HVOF) Molybdenum coating. This advanced coating process creates a dense, well-bonded layer that significantly enhances wear resistance and reduces friction between the ring and cylinder wall. This means better sealing, improved oil control, and longer ring life, especially under higher operating temperatures and pressures. This bulk pack contains 48 rings, making it suitable for engine builders or shops working on multiple engines or high-performance builds requiring precision components.

When installing these rings, ensure the cylinder walls are properly honed to the correct cross-hatch pattern to allow for optimal ring seating and oil retention. Proper ring gap setting is also critical for performance and longevity, so always refer to your engine build specifications. This set is not CARB approved and cannot be shipped to California.