The catalog uses a structured numbering system to help users identify the quality and type of ring set: : Denotes a Premium piston ring set. 5XXXXX : Denotes a Standard piston ring set. SXXXXX : Denotes a Single replacement piston ring. Key Technical Features

: Modern steel rings are 35% stronger than traditional cast iron, allowing for thinner, lighter designs that still withstand higher cylinder pressures.

: Dedicated to specialized performance rings, including steel compression rings and napier second rings. Decoding Part Numbers

MAHLE's rings are engineered with specific technologies to maximize sealing and reduce friction: