MAHLE 3021347 Performance Piston Ring Set Bore Steel Napier Ring - 4.315 2nd

The MAHLE 3021347 is a high-performance piston ring set engineered for precision engine builds requiring a 4.315-inch bore diameter. This premium ring set features a steel Napier-style second compression ring design, offering superior oil control and combustion sealing in demanding applications.

Key Specifications:

• Bore Size: 4.315 inches
• Ring Thickness: 0.043 inches
• Radial Wall Thickness: 0.135 inches
• Plain ring design for consistent sealing performance
• Steel Napier second ring configuration for enhanced oil control

MAHLE piston rings are manufactured to OE specifications and beyond, utilizing advanced materials and coatings to provide optimal compression sealing, heat transfer, and durability. The steel Napier design on the second ring provides effective oil metering while maintaining the structural integrity needed for high-performance and racing applications. Each ring set is precision-machined to ensure proper end gap and cylinder wall contact for maximum efficiency and longevity.

Ideal for engine builders and performance enthusiasts working with large-bore V8 engines commonly found in street performance, marine, and racing applications.