Mahle Rings Performance Napier THM-13 4.155 x .043 .135in RW Plain Ring Set (48 Qty Bulk Pack)

These Mahle Performance Napier piston rings are built with a 4.155 inch bore size and feature a .043 inch top ring and a .135 inch oil ring. The Napier hook design on the top ring helps to improve oil control and reduce blow-by, which is crucial for maintaining engine performance and efficiency. This bulk pack contains 48 sets of rings, making it a solid option for engine builders or shops working on multiple vehicles. Mahle OE is known for well-built engine components, and these rings are designed to provide reliable sealing in a variety of engine applications.

The construction of these rings is focused on durability and consistent performance. The plain ring finish is a straightforward approach that ensures proper seating and function. When rebuilding an engine, proper ring seal is essential for compression, oil control, and overall engine health. These Mahle rings are intended to help achieve that critical seal, contributing to the longevity and performance of the rebuilt engine.