MAHLE 3021248 Performance Steel Napier Piston Ring Set Bore - THM-13 4.135

The MAHLE 3021248 is a high-performance steel piston ring set designed for precision engine builds requiring a 4.135-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 under demanding conditions.

Key Specifications:

• Bore Size: 4.135 inches
• Top Ring Thickness: 0.043 inches
• Second Ring Thickness: 0.135 inches
• Construction: Performance steel material for high-temperature resilience
• Design: Napier THM-13 configuration with plain ring style
• Profile: RW (Reverse Wear) profile for optimized oil control

Features and Benefits:

• Precision-manufactured to MAHLE's exacting tolerances for consistent performance
• Steel construction provides excellent heat resistance and dimensional stability
• Napier ring design promotes effective combustion sealing and oil management
• Ideal for performance rebuilds, racing applications, and high-output engines
• Plain ring surface allows for custom fitting and finishing

MAHLE is a globally recognized OEM supplier known for producing premium engine components trusted by professional engine builders and automotive enthusiasts. This ring set is manufactured to meet or exceed original equipment specifications while offering the performance characteristics demanded in competition and high-performance street applications.