Mahle Rings 4.0650 Bore Dia 1.2MM Edge Width Steel Plasma Moly Top Ring Moly Ring Set

This Mahle OE Piston Ring Set features a 1.2mm edge width on the top ring, which is constructed from steel and treated with a plasma moly coating for improved durability and performance. The accompanying oil control ring also utilizes a moly coating, a well-known material for its friction-reducing properties. These rings are designed for a 4.0650 inch bore diameter, making them a solid option for engine rebuilds where precise fitment is crucial.

Mahle OE is a popular name in engine components, and this ring set reflects their commitment to well-built parts. The combination of steel for strength and plasma moly for wear resistance on the top ring helps ensure a good seal against the cylinder wall, which is essential for proper compression and oil control. This attention to material and design helps maintain engine health and performance over time.