Mahle Rings Plasma Moly Steel Top Comp Ring 4.125in x .0625in .190in RW Ring Set (48 Qty Bulk Pack)

Mahle is a well-known name in engine components, often supplying parts directly to vehicle manufacturers. This bulk pack of 48 top compression rings is designed for engine builders and performance shops working on multiple builds or high-volume projects. These rings are crafted from plasma moly steel, a strong material known for its durability and resistance to wear, which is crucial for the demanding environment inside an engine cylinder. The plasma moly coating further enhances the ring's surface hardness and reduces friction, helping to ensure a good seal between the piston and cylinder wall.

Each ring measures 4.125 inches in bore diameter and has a thickness of .0625 inches with a .190 inch ring depth. This specific sizing is common in many performance and heavy-duty engine applications. The RW designation indicates a specific ring type, often related to its tension or face design, intended to create an effective seal under various operating conditions. Using high-quality piston rings like these is essential for proper engine compression, oil control, and overall performance. They play a vital role in preventing combustion gases from escaping past the piston and oil from entering the combustion chamber.

This pack contains 48 individual rings, making it a practical choice for engine rebuilders who need a consistent supply of reliable components. It's important to note that these rings are not CARB approved and cannot be shipped to California. Always refer to your specific engine's service manual for correct installation procedures and ring gap specifications.