Mahle Rings Plasma Moly Steel Top Comp Ring 4.130in x .0625in .190in RW Ring Set (48 Qty Bulk Pack)

This is a bulk pack of 48 Mahle OE Plasma Moly Steel Top Compression Rings. Each ring measures 4.130 inches in bore diameter, has a thickness of 0.0625 inches, and a back clearance of 0.190 inches. These rings are designed for the top compression ring position in an engine's piston assembly.

Mahle uses plasma-moly steel for these top compression rings, a well-known material choice for its durability and performance in demanding engine conditions. The plasma-moly coating helps reduce friction between the ring and the cylinder wall, which can lead to improved engine efficiency and a longer ring life. This coating also offers good resistance to wear, especially important in high-performance or heavy-duty applications where engines work harder. The specific dimensions – 4.130 inch bore, 0.0625 inch thickness, and 0.190 inch back clearance – are critical for proper sealing and oil control within the cylinder. Ensuring the correct ring dimensions for your specific engine build is key to optimal performance and longevity.

This is a bulk pack, meaning you get 48 rings, which is ideal for engine builders or shops working on multiple engines or larger V-configuration engines that require many cylinders. 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 or build specifications to confirm these ring dimensions are appropriate for your application.