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Mahle MS file-fit piston rings are offered to match precise bore sizing and provide reliable ring seal in rebuilt or modified engines. These rings are supplied as 4.125" plus .005in sets with 1.5, 1.5 and 3.0 mm ring heights for top, second and oil rings respectively, intended for file-fit installation. The set emphasizes correct sizing and practical compatibility rather than speculative claims about materials or gains.
Mahle MS 4.125in+ .005in 1.5 1.5 3.0 mm File Fit Rings
