Mahle Rings Performance 4.200in x 1.5MM .151 RW Plasma-Moly Steel Top Ring Moly Ring Set

When you're rebuilding the top end of your engine and need reliable piston rings, Mahle OE offers a solid option. These rings are designed for a 4.200-inch bore, a common size for many performance applications. The top rings are made from plasma-moly steel, which is known for its strength and durability under demanding conditions. The moly coating on the second ring helps reduce friction and wear, contributing to a longer-lasting seal.

Mahle has been a well-known name in engine components for a long time, and these rings reflect that experience. The 1.5mm top ring thickness is a standard specification that works well with many piston designs. When installing, make sure your cylinder walls are properly honed and clean to ensure these rings seat correctly and provide a good seal for optimal compression and oil control.