Mahle Rings Performance Steel Napier THM-13 4.135 x .043 .135 RW Plain Ring Set

Mahle OE Performance Steel Napier Piston Rings are a solid option for engine rebuilds. This set, part number THM-13, is designed for a 4.135 inch bore and features a .043 inch top ring, .043 inch second ring, and a .135 inch oil ring. The Napier hook on the second ring helps improve oil control and reduce blow-by, especially in performance applications. These rings are made from durable steel for longevity.

When you're rebuilding an engine, the piston rings are critical for sealing the combustion chamber, controlling oil consumption, and transferring heat. Mahle OE is a well-known name in engine components, and this set offers a strong balance of performance and reliability. The steel construction means they can handle the stresses of regular operation. Remember that these rings are not CARB approved and cannot be shipped to California.