Mahle Rings Performance Steel Napier 2nd Ring 4.315in x .043 .135in RW Plain Ring Set

This Mahle OE Piston Ring set uses a steel Napier 2nd ring, measuring 4.315 inches in diameter with a thickness of 0.043 inches and a depth of 0.135 inches. The Napier design is a specific type of ring that helps to scrape oil off the cylinder wall more effectively, which can lead to improved oil control and reduced oil consumption. Using steel for this ring also contributes to its durability and ability to maintain its shape under high temperatures and pressures found in an engine.

Mahle is a well-known name in engine components, and this ring set is built to their standards for performance and reliability. The plain finish on the ring is typical for many performance applications, allowing it to seat properly against the cylinder wall. When rebuilding or refreshing an engine, choosing the right piston rings is crucial for proper cylinder sealing, which directly impacts compression, power, and oil consumption.