Mahle Rings Grey Iron THG 1.5MM Second Ring 3.9074in x .0586 .163 RW Plain Ring Set

When you're rebuilding the top end of your engine, getting the right piston rings is crucial for proper sealing and compression. These second rings from Mahle OE are made from grey iron, a solid material for this application, and are designed to fit pistons with a 3.9074-inch bore.

The 1.5mm thickness and 0.0586-inch width are standard dimensions for many applications, ensuring a good seal against the cylinder wall. The RW (raised wall) design helps prevent blow-by and keeps oil from entering the combustion chamber, which is important for engine health and performance. Mahle is a well-known name in engine components, and these rings are a well-built option for your rebuild.