MAHLE 41489CP Precision-Ground Performance Piston Ring Set

The MAHLE 41489CP is a precision-ground performance piston ring set engineered to OE-quality standards. MAHLE is the world's largest piston ring manufacturer, with over a century of experience supplying original equipment and aftermarket applications — bringing that same OE expertise to every replacement ring set.

These rings are built on an SAE 9254 high-alloy steel base material, delivering higher tensile and yield strength, extended fatigue resistance, and increased material hardness for long-term durability under demanding operating conditions.

Key Features:

• Installer-Friendly Design: Pre-lapped to seat immediately, virtually eliminating break-in time
• Barrel-Faced Top Compression Ring: Promotes efficient compression with a CNC-controlled gap chamfer to optimize sealing and reduce blow-by
• Reverse-Twist Intermediate Ring: Provides superior groove side sealing with taper-race machining for enhanced cylinder wall contact
• CP-20 Oil Ring Assembly: Features an exclusive 20-degree ear angle for maximum side seal against the cylinder wall, plus a chemically polished expander for improved oil drain-back
• Plasma-Moly Top Ring Coating: Offers exceptional wear resistance and reduced friction for extended service life under severe operating conditions
• Fail-Safe Installation: Rings are designed so they cannot be installed incorrectly, saving time and reducing errors during assembly
• Optimized Ring Tension: Materials, coatings, and tension are all application-matched to minimize friction and maximize engine longevity

Whether you're performing a complete engine overhaul or a targeted re-ring job, the MAHLE 41489CP piston ring set delivers the precision, reliability, and ease of installation that professional engine builders depend on.