Mahle MS 4.130in+.005in .043in 1.5mm 3.0mm File Fit Rings

Mahle is a well-known name in engine components, often supplying parts for original equipment manufacturers. This set of file fit piston rings is designed for engine rebuilds where precise ring gap adjustment is needed. The rings are manufactured to specific tolerances, allowing you to file them down to achieve the exact gap required for your engine's bore and intended use.

This particular set features a standard tension design and includes three different ring thicknesses: 0.043 inches for the oil ring, 1.5mm for the second compression ring, and 3.0mm for the top compression ring. They are also supplied at +.005 inches oversize, meaning you'll need to file the ends to achieve the correct clearance in your cylinder bores. This file-fit approach is common in performance builds or when working with non-standard bore sizes, offering a level of customization not found in pre-gapped rings.

Please note that these rings are not CARB approved and cannot be shipped to California. Always refer to your engine's service manual for proper ring gap specifications and installation procedures.