MAHLE 3021359 Performance Steel Napier Ring Set Bore - 2nd 3.634in

The MAHLE 3021359 is a high-performance piston ring set engineered for precision engine builds requiring a 3.634-inch bore diameter. This set features premium steel construction with MAHLE's advanced Napier design for the second compression ring, delivering superior sealing and oil control in demanding applications.

Key Specifications:

• Bore Size: 3.634 inches
• Ring Width: 1.0mm top compression ring
• Radial Wall Thickness: 0.136 inches
• Material: Performance-grade steel construction
• Design: Napier profile second ring for enhanced oil control
• Configuration: Plain ring set design

MAHLE piston rings are manufactured to OE specifications and beyond, utilizing advanced materials and coatings to provide excellent wear resistance, reduced friction, and optimal combustion sealing. The Napier second ring design features a hook-shaped profile that improves oil scraping efficiency while maintaining proper cylinder wall lubrication. Ideal for performance rebuilds, race engines, and high-output applications where precision fitment and durability are critical.