Mahle Rings 4.155in Bore .043in 3/16in Plasma Moly Duct Low Tension Reduced Radial Moly Ring Set

Mahle is well-known for making solid OE replacement parts, and these piston rings are no exception. If you're rebuilding an engine and need a reliable set of rings for a 4.155-inch bore, these are a great option. They're designed with a low tension, reduced radial pressure setup, which helps them seal well against the cylinder wall without putting excessive force on it. This can lead to better oil control and improved compression over time.

The plasma moly duct construction is a notable feature here. Moly coatings are popular because they offer good wear resistance and help reduce friction, which is important for the longevity of both the rings and the cylinder walls. The duct design further aids in oil distribution and helps prevent sticking. These rings are built to fit right and perform as expected in a wide range of engine applications where a 4.155-inch bore is specified.