Mahle Rings Steel Napier THM-13 4.605 Bore x .043in .135 RW Plain Ring Set (48 Qty Bulk Pack)

These Mahle OE Steel Napier piston rings are built with a .043 inch thickness and a 4.605 inch bore size, featuring a THM-13 design. This specific Napier hook design helps to improve oil control by creating a more effective scraping action on the cylinder wall, which is crucial for preventing excessive oil consumption and blow-by. This bulk pack contains 48 sets of rings, making it a solid option for engine builders or shops working on multiple projects.

The steel construction offers good durability for demanding engine builds. The plain ring finish means they are ready to be installed without additional coatings, and the .135 inch ring width is a common specification for many performance and heavy-duty applications. Mahle is a well-known name in engine components, and these rings are made to OE specifications, ensuring they will perform as expected when properly installed.