MAHLE 42248CP Premium Plasma-Moly Piston Ring Set

The MAHLE 42248CP is a premium engine piston ring set engineered for reliable sealing performance, reduced friction, and long service life. Manufactured by MAHLE — a globally recognized leader in engine components — this ring set is built to OE-grade standards and designed with the precision and material quality demanded by professional engine builders and serious enthusiasts alike.

Key Features:

• Pre-lapped design seats immediately upon installation, virtually eliminating traditional break-in time
• Optimized ring materials, coatings, and tension work together to minimize friction and maximize ring longevity
• Barrel-faced top compression ring with CNC-controlled gap chamfer delivers efficient compression and reduces blow-by
• Intermediate (second) ring features a reverse-twist design for superior groove side sealing, with taper-face machining to enhance cylinder wall contact
• CP-20 oil ring assembly uses an exclusive 20-degree ear angle for optimal side sealing against the cylinder wall, plus a chemically polished oil ring expander for enhanced oil drain-back
• Ring gap is pre-set from the factory, making installation straightforward and installer-friendly

The MAHLE 42248CP piston ring set reflects MAHLE's commitment to engineered performance — every ring in the set is purpose-built to maintain compression integrity, control oil consumption, and reduce parasitic friction losses across the full operating range of the engine.