Mahle Rings Performance Steel Napier THM-13 4.055 x .043 .135 RW Plain Ring Set

These Mahle Performance Steel Napier piston rings feature a 4.055 inch bore size with a .043 inch top ring thickness and a .135 inch oil ring width. The Napier hook design on the top ring helps to improve oil control and reduce blow-by, especially under demanding conditions. This set is constructed from durable steel for reliable performance.

Mahle OE is known for well-built engine components, and this ring set is no exception. The precise manufacturing ensures a solid seal between the piston and cylinder wall, which is crucial for maintaining compression and preventing oil from entering the combustion chamber. This helps your engine run more efficiently and can contribute to a longer lifespan for your internal components.

Please note that this ring set is not CARB approved and cannot be shipped to California. Always refer to manufacturer instructions for proper installation and break-in procedures.