MAHLE 3021339 Performance Steel Napier Ring Set Bore - 2nd 3.5531in

The MAHLE 3021339 is a high-performance piston ring set featuring a steel Napier-style second compression ring designed for precision engine builds. This ring set is engineered for 3.5531-inch bore diameter applications and delivers superior sealing and durability in demanding performance environments.

Key Specifications:

• Bore diameter: 3.5531 inches (90.249mm)
• Ring thickness: 1.2mm
• Radial wall thickness: 0.135 inches
• Second ring design: Steel Napier profile
• Plain ring configuration

MAHLE's steel Napier second rings provide excellent oil control and improved sealing characteristics compared to standard cast iron designs. The Napier profile features a hooked face geometry that enhances scraping action during the downstroke while maintaining consistent compression sealing. This ring set is ideal for performance rebuilds, racing applications, and high-output engines where reliability and power retention are critical.

MAHLE is a globally recognized OEM supplier known for precision-manufactured engine components that meet strict tolerances. Each ring set undergoes rigorous quality control to ensure proper fit, tension, and surface finish for optimal engine performance and longevity.