MAHLE 4185MS-112 File Fit Piston Ring Set Bore Oversize - 4.180 005

The MAHLE 4185MS-112 is a premium file-fit piston ring set designed for high-performance engine builds requiring precise bore sizing. This set is engineered for a 4.180-inch bore diameter with a +.005-inch oversize, providing optimal ring-to-cylinder wall contact and sealing performance.

Key Specifications:

• Bore Size: 4.180 inches with +.005-inch oversize (4.185 inches)
• Top Ring: 1.0mm thickness
• Second Ring: 1.0mm thickness
• Oil Ring: 2.0mm thickness
• File-fit design allows precise end-gap customization during installation

Features and Benefits:

• File-fit construction enables professional engine builders to precisely gap rings for specific applications and bore conditions
• MAHLE OE-quality materials and manufacturing ensure durability and consistent performance
• Metric ring widths (1.0mm/1.0mm/2.0mm) compatible with modern piston designs
• Oversize specification ideal for rebuilt engines with bored cylinders

MAHLE piston rings are manufactured to strict tolerances using advanced metallurgy and coatings, providing excellent wear resistance, oil control, and compression sealing. The file-fit design is essential for professional engine building where precise ring end-gap is critical for performance and longevity.