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Mahle MS piston ring set sized 3.898" +0.005" includes 1.0mm, 1.0mm and 2.0mm file-fit rings for accurate final fitment. Intended for engine rebuilds where rings are filed to match bore dimensions, the set enables proper end-gap control and ring-to-bore clearance. The copy emphasizes shop-style preparation: measure the cylinder, file rings to specification, then install for reliable sealing.
Mahle MS 3.898in +.005in 1.0mm 1.0mm 2.0mm File Fit Rings
