Mahle Rings Performance Napier Steel 2nd Ring 4.155in x 1.0MM .136in RW Plain Ring Set

This Mahle OE Performance Napier steel second ring is built with a 1.0mm thickness and a 4.155-inch bore size in mind. The Napier hook design helps to scrape oil from the cylinder wall, which is crucial for proper engine lubrication and preventing oil from entering the combustion chamber. This specific ring is a well-built component designed to work effectively within the piston assembly.

The steel construction offers good durability for this critical engine part. It's a plain ring, meaning it doesn't have additional coatings or treatments beyond its base material and manufacturing process, focusing on the essential function of sealing and oil control. When rebuilding or refreshing an engine, using well-made piston rings like these from Mahle OE is important for restoring compression and ensuring the engine runs smoothly.