MAHLE 4170MS-112 File Fit Piston Ring Set Bore Oversize - 4.165 005

The MAHLE 4170MS-112 is a premium file-fit piston ring set designed for high-performance engine builds requiring precise custom fitting. This set is engineered for a 4.165-inch bore diameter with a +.005-inch oversize specification, providing optimal compression and oil control in rebuilt or modified engines.

Key Specifications:

• Bore Size: 4.165 inches with +.005-inch oversize
• Top Ring: 1.0mm thickness
• Second Ring: 1.0mm thickness
• Oil Ring: 2.0mm thickness
• File-fit design allows precise end gap customization for your specific application

File-Fit Technology:

File-fit piston rings are manufactured with extra material on the ring ends, allowing engine builders to custom-fit the end gap to exact specifications. This ensures optimal ring seal, proper blowby control, and maximum performance. The file-fit design is essential for performance builds, racing applications, or engines operating under extreme conditions where precise tolerances are critical.

MAHLE is a leading OEM supplier and aftermarket manufacturer known for precision-engineered piston rings that deliver exceptional durability, reduced friction, and superior sealing performance. Each ring set meets strict quality standards to ensure reliable engine operation.