Mahle Rings Performance Plasma Steel Top Ring 3.942in x 1.0MM .143in RW HVOF Moly Ring Set

This is a set of Mahle OE performance piston rings. Specifically, these are the top rings, measuring 3.942 inches in diameter with a 1.0mm thickness and a 0.143-inch width. They are constructed from plasma-coated steel and utilize a High-Velocity Oxygen Fuel (HVOF) Moly coating for enhanced wear resistance and performance.

These rings are designed to create a solid seal between the piston and cylinder wall, which is crucial for proper engine compression, oil control, and efficient combustion. The plasma coating on the top ring helps it withstand the high temperatures and pressures found in the combustion chamber, contributing to longer engine life and consistent performance. The HVOF Moly application further improves their ability to resist friction and wear against the cylinder bore.