Mahle Rings Performance Plasma Steel Top Ring 4.040in x 1.0MM .143in RW HVOF Moly Ring Set

This is a set of Mahle OE Performance Plasma Steel Top Rings, designed for a 4.040-inch bore. These rings are crucial for sealing the combustion chamber, ensuring that the power generated by your engine isn't lost past the piston. The plasma-sprayed Moly coating on these top rings is a notable feature, applied using a High-Velocity Oxygen Fuel (HVOF) process. This advanced coating helps reduce friction and wear, which can lead to a longer ring life and better overall engine performance.

When you're rebuilding an engine or looking to replace worn-out piston rings, choosing a well-built set like these Mahle rings makes a difference. The 1.0mm top ring thickness and .143-inch ring groove width are standard dimensions for many performance applications, ensuring a proper fit in the corresponding piston groove. The steel construction offers good strength and resilience under the high temperatures and pressures found in an engine's cylinder.