Mahle Rings Performance Steel Napier THM-13 4.055 x .043 .135 RW Plain Ring Set (48 Qty Bulk Pack)

This is a bulk pack of 48 Mahle OE Performance Steel Napier piston ring sets, specifically the THM-13 model. These rings are designed for engines with a 4.055 inch bore, featuring a .043 inch top ring, .135 inch oil ring, and a Napier hook second ring. Mahle is a well-known name in engine components, and these steel rings are built for durability and performance in demanding applications.

The Napier hook on the second ring is a notable design feature. It helps to break up the oil film on the cylinder wall, which can improve oil control and reduce blow-by, especially in high-performance or heavy-duty engines. The steel construction offers good wear resistance and strength, making these a solid option for engine rebuilds where reliability is key. This bulk pack is ideal for shops or builders who frequently work on engines requiring this specific ring size and configuration.