Mahle Rings Performance Napier THM-13 4.180 x .043 .135in RW Plain Ring Set

This set includes the piston rings you need for your engine rebuild. Specifically, you're getting a performance Napier ring set designed for a 4.180 inch bore. The top ring is 0.043 inches thick, and the oil ring is 0.135 inches thick, featuring a Napier style for better oil scraping.

Mahle is a well-known name in engine components, and this ring set is built for performance applications. The Napier hook on the second ring is a notable design feature that helps improve oil control by scraping oil from the cylinder wall on the downstroke. This can lead to better sealing and reduced oil consumption, especially in engines that see higher performance use.