MAHLE 4040MS-112 File Fit Piston Ring Set Bore - 4.035in 1.0mm 1.0mm 2.0mm

The MAHLE 4040MS-112 is a precision-engineered file-fit piston ring set designed for high-performance engine applications. This ring set features a 4.035-inch bore diameter with an additional 0.005-inch oversize, making it ideal for custom engine builds and performance rebuilds where exact fitment is critical.

Key Specifications:

• Bore Size: 4.035 inches (plus 0.005-inch oversize)
• Top Ring: 1.0mm width
• Second Ring: 1.0mm width
• Oil Ring: 2.0mm width
• File-fit design allows for precise end-gap customization
• Manufactured by MAHLE, a leading OEM supplier known for premium piston ring technology

File-Fit Advantage:

File-fit rings require manual end-gap fitting by filing the ring ends to achieve the precise clearance specified for your engine. This ensures optimal ring seal, reduced blow-by, and maximum performance. These rings are essential for professional engine builders who demand exact tolerances in competition and high-performance applications.

MAHLE piston rings feature advanced materials and coatings that provide excellent wear resistance, heat dissipation, and oil control. The precise ring profile ensures proper sealing throughout the engine's RPM range while minimizing friction losses.