Mahle MS piston ring set sized 4.020" +0.005" includes 1.0mm, 1.0mm and 2.0mm file-fit rings for accurate final fitting. Supplied for measured installation in engine rebuilds, the rings allow proper end-gap control and ring-to-bore clearance when fitted by a technician. The description highlights the file-fit nature of the set and its role in completing a precision rebuild.
Mahle MS 4.020in +.005in 1.0mm 1.0mm 2.0mm File Fit Rings