MAHLE 3021371 Performance Piston Ring Set Bore Steel Napier Ring - 3.922 2nd

The MAHLE 3021371 is a high-performance piston ring set designed for precision engine builds requiring a 3.922-inch bore diameter. This specialized ring set features a steel Napier-style second ring, engineered to provide superior oil control and combustion sealing in demanding applications.

Key Specifications:

• Bore diameter: 3.922 inches
• Ring thickness: 1.0mm
• Radial wall thickness: 0.136 inches
• Performance steel Napier design second ring
• Plain ring configuration

MAHLE's performance ring sets are manufactured to exacting tolerances using premium materials, making them ideal for racing engines, high-performance rebuilds, and custom engine applications. The steel Napier second ring design offers enhanced durability and improved oil control compared to standard cast rings, while the plain ring surface allows for custom finishing to match specific cylinder wall conditions and break-in requirements.

This ring set provides professional engine builders with the quality and precision demanded by high-performance and competition engine applications.