MAHLE 3021231B Performance Piston Ring Set Bore Napier Steel - 4.270 1.0mm

The MAHLE 3021231B is a high-performance piston ring set designed for precision engine builds requiring a 4.270-inch bore diameter. This ring set features a premium Napier steel second ring construction, engineered to deliver superior durability and cylinder sealing performance in demanding applications.

Key Specifications:

• Bore diameter: 4.270 inches
• Ring thickness: 1.0mm
• Radial wall thickness: .136 inches
• Second ring material: Napier steel for enhanced wear resistance
• Plain ring design for standard cylinder wall applications
• Bulk packaging for professional engine builders

MAHLE piston rings are manufactured to OE specifications and beyond, utilizing advanced materials and coatings to maximize ring life and maintain optimal compression. The Napier steel second ring provides excellent oil control and thermal stability, making this ring set ideal for performance and racing applications where reliability is critical.

This bulk plain ring set is designed for professional engine builders and performance enthusiasts who demand precision-manufactured components for their engine builds.