Mahle Rings Plasma-Moly Ductile 4.1875in x .0630in .173in RW Moly Ring Set (48 Qty Bulk Pack)

The plasma-moly ductile iron construction in these Mahle piston rings is a key detail, offering a strong base for durability in demanding engine builds. These rings are specifically sized for a 4.1875-inch bore, with a top ring thickness of 0.0630 inches and a second ring thickness of 0.173 inches. This set comes in a bulk pack of 48, making it suitable for engine shops or builders working on multiple engines or high-performance applications where precision and material strength are paramount.

Mahle has a long-standing reputation for producing well-made engine components, and this ring set continues that tradition. The plasma-moly coating on the ductile iron helps reduce friction and wear on both the rings and the cylinder walls, which can lead to improved engine longevity and consistent performance over time. This is particularly important in performance engines where higher cylinder pressures and temperatures are common. The precise sizing ensures a proper seal between the piston and cylinder wall, which is critical for maintaining compression and preventing blow-by.

When rebuilding an engine, especially one that will see hard use or is being built for maximum power, the quality of the piston rings is often overlooked but is absolutely critical. These Mahle rings are designed to handle the stresses of performance applications. Keep in mind that this set is not CARB approved and cannot be shipped to California. Always refer to your specific engine build requirements and manufacturer instructions for proper installation and compatibility.