Mahle Rings Performance Steel Napier 2nd Ring 3.556in x 1.0MM .136in RW Plain Ring Set

This is a Mahle OE steel Napier 2nd ring set, part number 3021356. It's designed for engine rebuilds where you need reliable piston ring performance. The Napier hook design on the second ring helps with oil control and prevents blow-by, which is crucial for maintaining compression and engine efficiency.

These rings are made from steel and feature a 3.556-inch diameter with a 1.0mm thickness for the second ring, and a 0.136-inch ring height. This specific sizing and material choice contribute to a solid seal against the cylinder wall, helping to ensure consistent power delivery and proper engine operation. They are a well-built component for anyone rebuilding their engine and looking for dependable parts.