MAHLE 3021230B Performance Piston Ring Set Bore Napier Steel Ring - 4.260 1.0mm 2nd

The MAHLE 3021230B is a high-performance piston ring set designed for 4.260-inch bore engines, featuring advanced Napier-style steel second rings for enhanced oil control and durability. This bulk plain ring set is engineered for racing and high-performance applications where superior ring seal and longevity are critical.

Key Features:

• 4.260-inch bore diameter for precise fitment in custom and performance engine builds
• 1.0mm thick Napier steel second ring for improved oil control and reduced friction
• 0.136-inch radial wall thickness (RW) ensures optimal ring tension and seal
• Performance-grade materials engineered to withstand high cylinder pressures and temperatures
• Bulk plain ring set configuration for professional engine builders and custom applications
• MAHLE quality manufacturing with precise tolerances for consistent performance

This ring set is ideal for engine builders working on custom high-performance builds, racing engines, or specialty applications requiring non-standard bore sizes. The Napier-style second ring design provides superior oil control compared to traditional ring profiles, making it an excellent choice for demanding performance environments.