MAHLE 41873CP.030 Original Premium Engine Piston Ring Set Oversize - 0.030

The MAHLE Original 41873CP.030 is a premium engine piston ring set engineered to OE specifications and designed for a +0.030" oversize bore application. As part of the MAHLE Original line, these rings are built to the same exacting standards as factory equipment, delivering reliable sealing performance, reduced friction, and extended engine life.

Key Features:

• Pre-lapped for immediate seating — virtually eliminates break-in time and simplifies installation
• Plasma-moly top compression ring — barrel-faced contact area promotes efficient compression and reduces blow-by
• CNC-controlled gap chamfer on compression rings optimizes sealing and minimizes combustion gas leakage
• Intermediate ring with reverse twist design — improves groove side sealing, with taper race machining to enhance cylinder wall contact
• CP-20 oil ring assembly — exclusive 20-degree ear angle delivers superior side sealing against the cylinder wall
• Special chemical polish on oil ring expander — promotes efficient oil drain-back and minimizes oil consumption
• Optimized ring tension and materials — reduces friction and wear for a longer service life
• +0.030" oversize bore — designed for use with bored or re-sleeved cylinder applications

MAHLE Original piston rings are driven by OE requirements and represent some of the most technically advanced piston ring technology available in the aftermarket. Whether used in a professional engine rebuild or a performance street build, the 41873CP.030 delivers installer-friendly design and dependable, long-term engine performance.