MAHLE 3021303B Performance Piston Ring Set Bore Napier Steel - 4.265 1.0mm

The MAHLE 3021303B is a high-performance piston ring set engineered for precision engine builds requiring a 4.265-inch bore diameter. This professional-grade ring set features a premium Napier steel second ring design, delivering superior durability and consistent sealing performance under demanding operating conditions.

Key Specifications:

• Bore Size: 4.265 inches
• Ring Width: 1.0mm
• Radial Wall Thickness: 0.136 inches
• Second Ring Material: Performance Napier steel construction
• Ring Face: Plain (non-coated) finish

MAHLE's precision manufacturing ensures tight tolerances and optimal ring-to-cylinder wall contact for maximum compression sealing and oil control. The Napier steel second ring provides excellent wear resistance while maintaining proper tension throughout the engine's operating range. This ring set is designed for performance applications where reliability and consistent power output are critical.

Application: Suitable for custom engine builds, performance rebuilds, and racing applications requiring this specific bore dimension. Always verify bore size and ring specifications match your engine's requirements before installation.