Mahle Rings Performance Steel Napier THM-13 4.185 x .1.5MM .150RW Plain Ring Set

When you're rebuilding the top end of your engine and need reliable piston rings, Mahle has a solid option. These steel Napier rings are designed to create a strong seal between the piston and cylinder wall, which is crucial for maintaining compression and preventing blow-by. A good seal means your engine will run more efficiently and powerfully.

This particular set features a Napier hook design on the second ring, which helps to rotate the ring during operation. This rotation aids in scraping oil from the cylinder wall and can help prevent the ring from sticking. The steel construction offers good durability for performance applications, and the specific dimensions are noted for precise fitment. It's important to ensure these match your piston and bore size exactly for proper installation and function.