The Mahle MS piston ring set sized 4.010in +0.005 includes three file-fit rings with thicknesses 1.5mm, 1.5mm and 3.0mm. Intended for engine rebuilding, the set supplies the correct oversize for finish-fitting to cylinder bores so builders can re-establish ring-to-bore contact, restore compression and regain oil control during routine assembly and break-in.
Mahle MS 4.010in+ .005in 1.5 1.5 3.0 mm File Fit Rings