MAHLE 41718.030 Plasma-Moly Piston Ring Set Bore Oversize - 4.085 030

The MAHLE 41718.030 is a premium plasma-moly piston ring set designed for performance and durability in diesel engine rebuilds. This .030" oversize ring set is precision-engineered for a 4.085" cylinder bore diameter, providing optimal sealing and compression in rebored engines.

Key Features:

• Plasma-moly face coating on compression rings for superior wear resistance and extended service life
• Ductile iron construction on top and second rings for exceptional strength and heat resistance
• Pre-lapped ring surfaces that seat immediately, virtually eliminating break-in time
• CP-20 oil ring assembly with exclusive 20-degree ear angle for superior cylinder wall sealing
• Ring thickness: 3.0mm top ring, 2.0mm second ring, 4.0mm oil ring assembly
• Barrel-faced compression rings with CNC-controlled gap chamfer to reduce blow-by
• Reverse twist design on intermediate rings for enhanced groove side sealing

MAHLE is a world-leading OE manufacturer with over a century of piston ring expertise. These rings feature SAE 9254 high-alloy steel material for higher tensile strength, extended fatigue resistance, and increased hardness. The installer-friendly design and optimized ring tension deliver reduced friction, improved oil control, and longer service life in demanding applications.