MAHLE 3021269 Performance Napier Piston Ring Set Bore - THM-10 3.937 1.5mm

The MAHLE 3021269 is a high-performance piston ring set designed for precision engine builds requiring a 3.937-inch bore diameter. This Napier-style ring set features MAHLE's THM-10 design, engineered to deliver superior sealing, reduced friction, and enhanced durability in demanding applications.

Key Features:

• 3.937-inch (100mm) bore diameter for precise fitment
• 1.5mm ring thickness for optimal sealing performance
• Napier-style ring design for improved oil control
• THM-10 performance specification for high-output engines
• Plain ring configuration without coatings
• Manufactured to MAHLE's OE-quality standards

MAHLE Motorsport piston rings are engineered using advanced materials and manufacturing processes to withstand the extreme pressures and temperatures of performance and racing applications. The Napier ring profile provides excellent oil control while maintaining low friction characteristics, making this ring set ideal for both street performance and competition builds.