Mahle Rings Perf Gas Nitride Steel 4.175in x .043in .157 RW Bulk Plain Ring Set (48 Qty Bulk Pack)

These Mahle piston rings are made from steel and feature a nitride coating, a tough surface treatment that helps them resist wear and hold up under the heat and pressure of combustion. The rings measure 4.175 inches in bore diameter and have a top ring thickness of 0.043 inches, with a standard 0.157 inch ring groove width. This bulk pack contains 48 rings, making it a practical choice for engine builders working on multiple projects or high-volume shops.

The nitride surface treatment is notable because it creates a very hard, wear-resistant layer on the steel. This means the rings can handle more aggressive cylinder wall finishes and higher operating temperatures without premature wear. They are designed for gasoline engines and are built to maintain a good seal between the piston and cylinder wall, which is crucial for proper engine performance, oil control, and preventing blow-by. Mahle is a well-known name in engine components, and these rings reflect their focus on durable, functional parts for serious engine work.

When rebuilding an engine, the piston rings are a critical component that directly impacts the engine's health and longevity. Ensuring you have the correct ring size and type for your application is key. This set is intended for gasoline engines and is sold in a bulk quantity of 48 units, so be sure this quantity meets your project needs. Please note that these rings are not CARB approved and cannot be shipped to California.