MAHLE 3021280 Performance Steel Napier Piston Ring Set Bore - THM-13 4.160

The MAHLE 3021280 is a high-performance steel piston ring set designed for precision engine builds requiring a 4.160-inch bore diameter. This professional-grade ring set features MAHLE's proven Napier THM-13 design, engineered to deliver superior sealing, reduced friction, and enhanced durability in demanding applications.

Key Specifications:

• Bore Size: 4.160 inches
• Top Ring: 1.5mm thickness
• Second Ring: 1.5mm thickness
• Oil Ring: 3.0mm standard tension
• Ring Width: 0.150" radial wall (RW)
• Material: Performance steel construction
• Design: Napier THM-13 profile
• Finish: Plain (non-coated)

Features and Benefits:

• Premium steel alloy construction provides excellent wear resistance and heat dissipation
• Napier top ring design optimizes oil control and reduces blow-by
• Precision-manufactured to tight tolerances for consistent cylinder sealing
• Plain finish suitable for proper break-in and seating
• Ideal for performance rebuilds, racing applications, and high-output engines

MAHLE is a globally recognized leader in engine components, trusted by professional engine builders and enthusiasts for OE-quality precision and reliability. This ring set is manufactured to exacting standards to ensure optimal performance and longevity in your engine build.