Mahle Rings Perf Plasma Steel Top Ring 4.030in x 1.0MM .143in RW HVOF Moly Ring Set (48 Qty Bulk Pk)

When you're rebuilding an engine, especially one that's going to see some hard use, the piston rings are a critical component. These Mahle Performance Plasma Steel Top Rings are built for those situations where you need reliable sealing and durability. They're designed for a 4.030-inch bore, which is a common size for many performance and heavy-duty applications, and feature a 1.0mm top ring width with a .143-inch oil ring width.

What sets these rings apart is the plasma-sprayed Moly coating on the top ring. This advanced coating is applied using a High-Velocity Oxygen Fuel (HVOF) process, which creates a very dense and well-bonded layer. This plasma Moly surface is known for its excellent wear resistance and its ability to reduce friction against the cylinder wall, which helps with heat dissipation and overall engine efficiency. The steel construction of the top ring also offers improved strength and heat resistance compared to cast iron, making them a solid choice for engines that will be pushed hard.

This is a bulk pack containing 48 rings, typically intended for engine builders or shops working on multiple engines. It's important to note that these rings are not CARB approved and cannot be shipped to California. Always refer to your engine's specific service manual for proper installation procedures and ring gap specifications.