Mahle Rings Performance Napier Steel 2nd Ring 4.020in x 1.0MM .136in RW Plain Ring Set

This Mahle OE Performance Napier Steel 2nd Ring Set is built with a 4.020 inch bore size, ensuring it fits precisely into the cylinder. The 1.0mm ring width and .136 inch thickness are specific dimensions for this particular application, designed to work with the piston to create a proper seal.

The Napier hook design on the second ring helps to scrape oil from the cylinder wall, which is crucial for preventing oil from entering the combustion chamber and causing issues like blue smoke or increased oil consumption. This steel construction is chosen for its durability and ability to maintain its shape under the heat and pressure of engine operation. Mahle OE is a well-known name in engine components, and this ring set is a solid option for rebuilding or repairing your engine.