Mahle MS piston rings set specified at 3.927"+0.005 with ring heights of 1.0mm, 1.0mm and 2.0mm is supplied for file-fit machining to engine tolerances. These rings are offered in the listed oversize and cross-section dimensions for builders and machinists who will fit and finish them to bore specifications during engine assembly.
Mahle MS 3.927in+.005in 1.0mm 1.0mm 2.0mm File Fit Rings