MAHLE 3021214 Performance Piston Ring Set Bore Napier Steel Ring - 4.040 with 2nd

The MAHLE 3021214 is a high-performance piston ring set engineered for precision engine builds requiring a 4.040-inch bore diameter. This professional-grade ring set features advanced ring technology designed to optimize compression sealing, oil control, and durability in demanding applications.

Key Features:

• 4.040-inch bore diameter for precise fitment
• Performance Napier steel 2nd compression ring for enhanced durability and heat resistance
• 1.0mm ring thickness for reduced friction and improved sealing
• 0.136-inch radial wall thickness (RW) for optimal ring stability
• Plain ring design for reliable performance
• Manufactured to MAHLE's exacting OE standards

MAHLE piston rings are engineered with advanced materials and coatings to provide superior wear resistance, reduced blow-by, and consistent performance across a wide range of operating conditions. The Napier steel 2nd ring design offers exceptional strength and thermal stability, making this ring set ideal for performance and racing applications where reliability is critical.

This ring set is designed for one cylinder. Verify bore size and ring specifications before installation to ensure proper fitment for your engine build.