MAHLE 3910MS-112 File Fit Piston Ring Set Bore Oversize - 3.905 005

The MAHLE 3910MS-112 is a premium file-fit piston ring set designed for precision engine rebuilds requiring exact ring gap specifications. This set is engineered for a 3.905-inch bore diameter with a +.005-inch oversize, making it ideal for bores that have been machined or naturally worn to 3.910 inches.

Key Specifications:

• Bore Size: 3.905 inches (+.005-inch oversize)
• Top Compression Ring: 1.0mm
• Second Compression Ring: 1.0mm
• Oil Control Ring: 2.0mm
• File-fit design allows custom fitting for optimal ring gap

File-Fit Advantage:

Unlike pre-gapped rings, file-fit rings come with unfinished end gaps that allow the engine builder to precisely file the ring ends to achieve the exact gap specification required for the specific application. This ensures optimal compression sealing, reduces blow-by, and accommodates various engine configurations and performance levels.

MAHLE Quality:

MAHLE is a leading OEM supplier known for precision-engineered piston rings that deliver excellent sealing properties, durability, and heat resistance. These rings feature advanced materials and coatings designed to minimize friction while maximizing compression seal and oil control throughout the engine's service life.

This ring set is commonly used in performance rebuilds, racing applications, and precision engine builds where exact tolerances are critical for optimal performance and longevity.