MAHLE 4070MS-112 File Fit Piston Ring Set Bore Oversize - 4.065 005

The MAHLE 4070MS-112 is a high-quality file-fit piston ring set designed for precision engine builds requiring custom fitment. This ring set is engineered for a 4.065-inch bore diameter with an additional +.005-inch oversize, providing flexibility for engine builders to achieve exact specifications through careful filing and fitting.

Key Features:

• File-fit design allows precise customization of end gaps for optimal cylinder sealing
• Bore size: 4.065 inches with +.005-inch oversize tolerance
• Ring configuration: 1.0mm top compression ring, 1.0mm second compression ring, 2.0mm oil control ring
• Manufactured by MAHLE, a trusted OEM supplier with over 100 years of piston technology expertise
• Premium materials and coatings ensure durability and excellent sealing properties
• Ideal for performance rebuilds, custom applications, and competition engines

File-fit rings require careful measurement and fitting to achieve proper end gap specifications. These rings are oversized and must be filed to match your specific cylinder bore dimensions, making them the preferred choice for professional engine builders and performance enthusiasts who demand precise tolerances and maximum compression sealing.