MAHLE 3021323 Performance Piston Ring Set Bore Steel Napier Ring - 3.307 2nd

The MAHLE 3021323 is a high-performance piston ring set engineered for precision engine builds requiring a 3.3071-inch bore diameter. This professional-grade ring set features a steel Napier-style second compression ring design that provides superior oil control and combustion sealing in demanding applications.

Key Specifications:

• Bore diameter: 3.3071 inches (84.00mm)
• Ring thickness: 1.2mm (.047 inches)
• Radial wall thickness: 0.135 inches
• Second ring configuration: Steel Napier design
• Plain ring set construction for reliable sealing

MAHLE piston rings are manufactured to OEM and aftermarket specifications using advanced materials and coatings. The steel Napier second ring design features a hooked profile that enhances oil control while maintaining excellent gas sealing properties. This ring set is ideal for performance engine rebuilds, racing applications, and high-output builds where precise bore sizing and reliable ring seal are critical for optimal compression and power output.