Mahle Rings Performance Plasma Steel Top Ring 4.000in x 1.0MM .143in RW HVOF Moly Ring Set

This is a Mahle OE piston ring set, part number 3011052, designed for engines with a 4.000-inch bore. These rings are a key component for proper engine function, creating a seal between the piston and cylinder wall to manage combustion pressure and control oil consumption. The top rings in this set are made from plasma-coated steel, a well-built material that offers improved wear resistance and durability compared to standard cast iron rings. This plasma coating, applied using HVOF (High Velocity Oxygen Fuel) thermal spray technology, creates a hard, dense surface that stands up well to the heat and friction inside the cylinder. The Moly (molybdenum) facing on the second ring further enhances its ability to reduce friction and wear against the cylinder wall, contributing to a longer-lasting engine.

Choosing Mahle OE rings means you're getting parts that meet the original equipment specifications for your engine. The precise dimensions, including the 1.0mm top ring thickness and 0.143-inch oil ring width, ensure a proper fit and function within the piston groove. This attention to detail helps maintain optimal compression and oil control, which are critical for engine performance and longevity. These rings are a solid option when rebuilding or refreshing an engine where reliable sealing and wear resistance are important.