Mahle Rings Performance Napier THM-13 4.125 x .043 .135in RW Plain Ring Set

These Mahle Performance Napier piston rings are built with a 4.125 inch bore size and feature a .043 inch top ring and a .135 inch oil ring. The Napier hook design on the top ring helps to improve oil control and prevent blow-by, especially in high-performance applications. This set is designed to provide a solid seal between the piston and cylinder wall, which is crucial for maintaining compression and optimizing engine power.

The construction of these rings contributes to their ability to withstand the rigors of engine operation. They are a well-built option for rebuilding or upgrading your engine's internal components. Proper installation is key to ensuring these rings perform as intended, helping to reduce oil consumption and maintain consistent engine performance over time.