Mahle Rings Perf Gas Nitride Steel 4.015 x .043 .157 RW Bulk Plain Ring Set (48 Qty Bulk Pack)

When you're rebuilding an engine, especially one that's going to see regular use, the piston rings are a critical component. What you get in this package is a bulk set of 48 Mahle Performance Gas Nitride Steel Piston Rings. These rings are designed for a 4.015 inch bore and feature a .043 inch top ring, a .157 inch oil ring, and a standard Napier hook second ring (RW). This specific configuration is common in many performance gasoline engine applications where durability and a good seal are paramount.

Mahle has a solid reputation for making well-built engine components, and these rings are no exception. The nitride steel construction for the top ring offers improved wear resistance and durability, which is important for maintaining a good seal under combustion pressure and heat. The .043 inch top ring thickness is a popular choice for performance builds, balancing sealing ability with reduced drag. The Napier hook on the second ring helps to scrape oil from the cylinder wall, preventing it from entering the combustion chamber and contributing to a cleaner burn and better oil control. This bulk pack is ideal for shops or builders who are working on multiple engines or a high-performance build that requires a specific set of rings.

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, as these can vary based on the application and intended use.