MAHLE 4045MS-112-1 Piston Ring Set 4.045" Bore 1.0mm 1.0mm 2.0mm File Fit

The MAHLE 4045MS-112-1 is a premium piston ring set designed for single-cylinder applications requiring precise bore sizing and professional installation. This file-fit ring set is engineered for 4.040" bore diameter with an additional 0.005" oversize, providing a final bore size of 4.045" for optimal sealing and performance.

Ring Configuration:

• Top compression ring: 1.0mm thickness
• Second compression ring: 1.0mm thickness
• Oil control ring: 2.0mm thickness
• Standard tension design for reliable sealing

Key Features:

• File-fit design allows precise end gap adjustment for your specific application
• +0.005" oversize accommodates light bore honing and cylinder wear
• MAHLE original equipment quality manufacturing
• Premium materials ensure durability and optimal sealing
• Single cylinder set—order multiple sets for multi-cylinder engines

MAHLE piston rings are manufactured to exacting tolerances and feature advanced coatings and metallurgy for extended service life. The file-fit design requires proper end gap filing during installation to achieve manufacturer-specified clearances for your engine's bore diameter and operating conditions.