MAHLE 3021191B Steel Napier Piston Ring Set Bore - THM-13 4.610 1.0mm

The MAHLE 3021191B is a high-performance steel Napier THM-13 piston ring set designed for precision engine builds requiring a 4.610 inch bore diameter. This professional-grade ring set features MAHLE's advanced steel construction and Napier second ring design, engineered to deliver superior sealing and durability in high-performance applications.

Key Specifications:

• Bore Size: 4.610 inches
• Ring Width: 1.0mm top ring thickness
• Radial Wall Thickness: .136 inch
• Design: Steel Napier THM-13 configuration
• Construction: Plain ring set without coating

Performance Features:

• Steel construction provides exceptional tensile strength and durability in demanding applications
• Napier THM-13 second ring design offers improved oil control compared to traditional reverse-twist designs
• Precision-machined to MAHLE's exacting tolerances for proper sealing and minimal blow-by
• 1.0mm low-profile ring design reduces friction for improved horsepower
• Plain finish allows for custom gap filing to match specific engine requirements

As the world's largest piston ring manufacturer, MAHLE leverages decades of engineering expertise and advanced ring simulation technology to produce rings that minimize friction while maximizing combustion sealing. This ring set is ideal for performance engine builders, race teams, and professional rebuilders who demand reliability and precision in high-output applications.