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The Mahle file-fit piston ring set for a 4.165 in. bore (+0.005 in) supplies 0.043 in. top and second rings with a 3.0 mm oil ring for precise end-gap matching and sealing during rebuilds. Intended for finishing work where rings are filed to fit, the set supports accurate ring seating and oil control when paired with correct bore preparation and gap-setting procedures.
Mahle MS 4.165in+.005in .043in .043in 3.0mm File Fit Rings
