Mahle Rings Performance Steel Napier THM-13 4.085 x .043 .135 RW Plain Ring Set (48 Qty Bulk Pack)

This is a bulk pack of 48 Mahle OE Performance Steel Napier piston rings, specifically the THM-13 style. These rings are designed for engine rebuilding applications where a robust and reliable ring seal is critical. The steel construction offers good durability, and the Napier hook on the second ring helps with oil control and prevents blow-by, especially in performance-oriented engines. This set is ideal for shops or builders who frequently work on engines requiring this specific ring configuration and size.

The rings measure 4.085 inches in bore diameter with a 0.043 inch top ring thickness and a 0.135 inch second ring thickness. Mahle is a well-known name in engine components, and this set reflects their commitment to well-built parts. Using quality piston rings like these is important for proper cylinder sealing, which directly impacts engine performance, oil consumption, and emissions. Ensure you have the correct bore size and ring groove dimensions before installation.