Mahle Rings Perf Steel Napier 2nd Ring 4.315in x .043 .135in RW Plain Ring Set (48 Qty Bulk Pack)

Mahle OE is known for making reliable engine components, and this set of performance steel Napier 2nd rings is no exception. These rings are designed for engines where a Napier hook design in the second ring is beneficial for oil control and blow-by reduction. The 4.315-inch bore size and specific dimensions (.043 inch width x .135 inch thickness) mean they are intended for a particular range of performance engine builds.

This is a bulk pack containing 48 rings, making it a solid option for engine builders who work on multiple vehicles or need spares. The steel construction offers good durability for performance applications, and the Napier hook design helps the ring seal effectively against the cylinder wall while also aiding in oil scraping. This updated ring design can contribute to improved engine sealing and performance compared to older styles.

Keep in mind that these rings are not CARB approved and cannot be shipped to California. Always refer to your specific engine build requirements and manufacturer recommendations when selecting piston rings.