MAHLE 3910MS-15 Piston Ring Set Bore File Fit - 3.905 1.5mm 1.5mm 3.0mm

The MAHLE 3910MS-15 is a high-performance piston ring set designed for 3.905" bore engines with a +.005" oversize tolerance. This file-fit ring set features standard tension construction and includes three rings with thicknesses of 1.5mm, 1.5mm, and 3.0mm, providing the optimal balance of sealing and friction reduction for performance applications.

Ring Configuration:

• Top ring: Ductile iron construction with plasma moly coating and barrel face profile for superior wear resistance and sealing
• Second ring: Cast iron reverse twist design to enhance oil control and cylinder wall sealing
• Oil ring: 3-piece standard tension design for effective oil management

Key Features:

• File-fit design allows for precise end-gap adjustment during installation
• Ultra-flat ring flanks maximize ring-to-piston groove sealing and minimize gas blow-by
• Engineered using advanced piston ring simulation and computer development tools
• Optimized to reduce friction and unlock free horsepower
• Standard tension oil rings provide proven reliability for street and performance builds

MAHLE's precision manufacturing and advanced materials engineering ensure these rings deliver exceptional sealing, reduced friction, and proven durability in both street and racing applications.