MAHLE 3021317 Performance Piston Ring Set 3.189" Bore 1.2mm Napier 2nd Ring

The MAHLE 3021317 is a high-performance piston ring set engineered for precision engine builds requiring a 3.1890-inch bore diameter. This ring set features advanced steel construction with a specialized Napier-style second ring design for enhanced oil control and combustion sealing.

Key Specifications:

• Bore Size: 3.1890 inches (81.00mm)
• Ring Width: 1.2mm
• Radial Wall Thickness: 0.135 inches
• Second Ring Type: Steel Napier profile
• Plain ring set configuration
• Performance-grade steel construction

MAHLE's Napier ring design incorporates a hooked profile on the second compression ring that provides superior oil control while maintaining excellent gas sealing properties. The steel construction offers increased durability and heat resistance compared to cast iron alternatives, making this ring set ideal for high-performance and racing applications. The precise 1.2mm width ensures proper tension and sealing in modern high-efficiency engine builds.

This ring set is designed for professional engine builders and performance enthusiasts who demand exacting tolerances and proven reliability in demanding applications.