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The Mahle MS piston ring set sized 4.030in +0.005 includes three file-fit rings with thicknesses 1.5mm, 1.5mm and 3.0mm. Intended for rebuilds, the kit provides the necessary oversize dimension for finish-fitting to cylinder bores so engine builders can restore compression and re-establish oil control during final assembly and break-in.
Mahle MS 4.030in+ .005in 1.5 1.5 3.0 mm File Fit Rings
