MAHLE 3771MS-112 File Fit Piston Ring Set Bore Oversize - 3.766 005

The MAHLE 3771MS-112 is a precision-engineered file-fit piston ring set designed for high-performance engine builds requiring custom fitment. This set is sized for a 3.766-inch bore with a +.005-inch oversize specification, providing flexibility for exact bore matching during engine assembly.

Key Specifications:

• Bore Size: 3.766 inches with +.005-inch oversize tolerance
• Top Ring: 1.0mm thickness
• Second Ring: 1.0mm thickness
• Oil Ring: 2.0mm thickness
• File-fit design allows precise end gap customization

Features and Benefits:

• File-fit construction enables custom fitting to exact cylinder bore specifications
• MAHLE engineering ensures optimal seal and reduced blow-by
• Precision-manufactured ring profile for superior ring seal and longevity
• Designed for performance and racing applications where exact tolerances are critical
• Compatible with custom engine builds requiring specific bore sizing

File-fit piston rings require manual fitting by filing the ring ends to achieve proper end gap clearance for your specific cylinder bore. This allows engine builders to optimize ring performance for various applications, from street performance to full racing builds. MAHLE's reputation for quality materials and precise manufacturing makes their piston rings a trusted choice among professional engine builders.