MAHLE 41615 OE Replacement Engine Piston Ring Set - Standard Size

The MAHLE 41615 is an OE-quality replacement piston ring set engineered to restore proper compression, oil control, and sealing in compatible engines. Manufactured to original equipment form, fit, and function specifications, this ring set delivers the precision and durability that engine rebuilders and professional technicians demand.

This set features a 1.5mm upper compression ring (UCR) of the RF-18PF type, a 1.5mm lower compression ring (LCR) utilizing the RBT-10 design, and a 4.0mm oil control ring (OCR) using MAHLE's exclusive CP-20 three-piece assembly. The shallow groove configuration is sized for standard bore applications.

Key Features:

• SAE 9254 high alloy steel base material for superior tensile strength, fatigue resistance, and hardness
• CP-20 oil control ring with exclusive 20-degree ear angle for optimal side sealing in the piston oil ring groove
• Napier second ring design provides superior oil control, improved combustion gas management, and top ring stability
• Pre-lapped rings seat immediately, virtually eliminating break-in time
• Ring tension and coatings optimized for reduced friction and extended service life
• Standard size — designed for standard bore applications
• Engineered to OE specifications for direct, installer-friendly fitment

MAHLE is one of the largest OE piston ring manufacturers in the world, with over a century of experience supplying rings to leading engine manufacturers globally. The MAHLE 41615 piston ring set reflects that heritage, providing engine builders with a reliable, high-quality solution for engine overhauls and rebuilds.