MAHLE 4145MS-112 File Fit Piston Ring Set 4.145" Bore 1.0mm 1.0mm 2.0mm

The MAHLE 4145MS-112 is a premium file-fit piston ring set designed for high-performance engine builds requiring precise bore sizing. This ring set is engineered for a 4.140" bore with a +.005" oversize, resulting in a final bore diameter of 4.145 inches.

Ring Configuration:

• Top compression ring: 1.0mm thickness
• Second compression ring: 1.0mm thickness
• Oil control ring: 2.0mm thickness

File-Fit Design:

• Rings require end-gap filing for precise fitment to your specific bore
• Allows exact customization of ring end gaps for optimal sealing
• Essential for performance applications where precise tolerances are critical

MAHLE is a globally recognized leader in piston ring technology, manufacturing OEM and aftermarket rings for automotive, racing, and performance applications. Their metric-width ring sets are popular in modern engine builds and performance rebuilds where reduced ring mass and friction are priorities. File-fit rings give engine builders complete control over end-gap specifications, ensuring optimal compression seal and oil control for maximum power and durability.

This ring set is sold per cylinder and must be matched to compatible pistons with 1.0mm/1.0mm/2.0mm ring groove dimensions.