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The Mahle MS piston ring set sized 4.020in +0.005 includes three file-fit rings with thicknesses 1.5mm, 1.5mm and 3.0mm. Provided for engine rebuilds, this oversize file-fit kit lets machinists finish rings to match cylinder bores, restoring ring-to-bore contact to recover compression and proper oil control as part of cylinder honing and assembly work.
Mahle MS 4.020in+ .005in 1.5 1.5 3.0 mm File Fit Rings
