Mahle MS piston ring set sized 3.786" +0.005" includes 1.0mm, 1.0mm and 2.0mm file-fit rings intended for precise final fitting. Supplied as a file-fit assortment, the rings let technicians adjust end gaps and ensure proper ring-to-bore clearance during engine rebuilds. The wording reflects shop use: measure the bore, file rings to spec, and install for correct sealing and oil control.
Mahle MS 3.786in +.005in 1.0mm 1.0mm 2.0mm File Fit Rings