MAHLE 3021211B Performance Piston Ring Set Bore Napier Steel - 4.010 1.0mm

The MAHLE 3021211B is a high-performance piston ring set engineered for precision engine builds requiring a 4.010-inch bore diameter. This bulk plain ring set features a premium Napier steel second ring design, delivering enhanced durability and sealing performance in demanding applications.

Key Specifications:

• Bore Size: 4.010 inches
• Ring Width: 1.0mm
• Radial Wall Thickness: 0.136 inches
• Second Ring Material: Performance Napier steel construction
• Configuration: Bulk plain ring set (rings sold individually without packaging)

MAHLE piston rings are manufactured to OE specifications and beyond, utilizing advanced materials and coatings to reduce friction, improve oil control, and maximize cylinder sealing. The Napier steel second ring design provides superior tensile strength and wear resistance compared to standard cast iron rings, making this set ideal for performance and racing applications where durability under high stress is critical.

This bulk plain ring set format is designed for professional engine builders and machine shops who need individual rings for custom engine assemblies or inventory stocking.