Mahle Rings Plasma Moly Steel Top Compression Ring 4.605in x .0625in .190in RW Moly Ring Set

When you're rebuilding the top end of your engine, getting the piston rings seated correctly is critical for sealing and performance. These Mahle OE plasma moly steel top compression rings are built to replace the original rings in your engine, ensuring a proper seal between the piston and cylinder wall. This helps maintain compression and prevent blow-by, which is essential for smooth operation and power delivery.

These rings feature a plasma moly coating on the top compression ring, a well-known method for improving wear resistance and reducing friction. The steel construction offers solid durability for the demanding environment inside a combustion chamber. This set is designed to fit pistons with a 4.605-inch bore and features a .0625-inch ring width and a .190-inch ring height, with an RW (reverse twist) design for the top ring, which is a common specification for many engines.