MAHLE 3150139.035 Plasma-Moly Piston Ring Set Bore - 4.035

The MAHLE 3150139.035 is a high-performance plasma-moly piston ring set designed for 4.035" bore (+.035" oversize) applications. This complete ring set is engineered for engines requiring superior sealing, durability, and resistance to extreme operating conditions.

Advanced Plasma-Moly Technology:

• MAHLE Original SAE 9254 steel combined with proprietary plasma face coating extends ring life, eliminates ring breakage, reduces side wear and minimizes groove pound-out problems
• Lighter ring design with smaller cross-sections better tolerates inertial forces and seals more effectively against the bottom of the ring groove
• Smaller cross-section permitted with higher strength material greatly improves ring conformability to cylinder bore distortion in high output, high RPM engines

Performance Features:

• Ring widths: 1/16", 1/16", 3.0mm configuration
• Standard tension design for reliable sealing
• Carbon steel construction with plasma-moly coating
• Barrel-faced top ring offers instant break-in and maintains contact with the cylinder wall as the piston rocks at TDC and BDC
• Napier THG (hook groove) second compression ring provides superior oil control by scraping cylinder walls and providing an oil reservoir on each downstroke
• CP-20 oil control ring with 20-degree ear angle provides exceptional cylinder wall seal

MAHLE Original performance piston ring sets are among the most technically advanced and rigorously tested, designed to operate at higher RPMs, compression ratios, and temperatures while remaining dependable under extreme conditions. Suitable for street performance, racing, and marine applications requiring a 4.035" bore diameter.