MAHLE 3021352B Performance Piston Ring Set Bore Steel Napier Ring - 4.075 2nd

The MAHLE 3021352B is a high-performance piston ring set engineered for precision engine builds requiring a 4.075-inch bore diameter. This professional-grade ring set features advanced materials and design for superior sealing and durability in demanding applications.

Key Features:

• 4.075-inch bore diameter for precise fitment
• Steel Napier-style second compression ring for enhanced oil control and sealing
• 1.5mm ring thickness for optimal tension and conformability
• 0.151-inch radial width (RW) for proper ring-to-wall contact
• Plain ring design without coatings for specific applications
• MAHLE precision manufacturing ensures consistent quality and performance

This ring set is designed for engine builders and performance enthusiasts who demand precise specifications and reliable sealing. The steel Napier second ring design provides excellent oil control while maintaining optimal compression sealing characteristics. MAHLE's expertise in piston ring technology ensures proper ring tension, wear resistance, and longevity in high-performance and racing applications.