Mahle MS 4.265in +.005in 1.0mm 1.0mm 2.0mm File Fit Rings

This is a Mahle MS piston ring set, sized at 4.265 inches with a +.005 inch file fit. These rings are designed for engine rebuilding where precise ring gap adjustment is needed. The set includes three rings with specific dimensions: 1.0mm for the top ring, 1.0mm for the second ring, and 2.0mm for the oil control ring, all with standard tension.

Mahle is a well-known name in engine components, and this ring set reflects their focus on providing parts for engine overhauls. The file-fit design means you'll need to carefully measure and file the end gap of the top ring to achieve the correct clearance for your specific engine build. This allows for a more tailored fit, which is crucial for optimal sealing and performance, especially in modified or high-performance applications. The standard tension is suitable for a wide range of applications where extreme boost pressures aren't a primary concern.

Keep in mind that these rings are not CARB approved and cannot be shipped to California. Always refer to your engine's specific service manual for correct installation procedures and ring gap specifications.