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The Mahle MS piston ring set is a file-fit replacement sized at 4.390" +0.005 for accurate sealing in engine rebuilds. It includes 1.5 mm top and second rings plus a 3.0 mm oil ring assembly to control combustion pressure and oil consumption. File-fit construction allows a machinist to lap rings to exact bore dimensions during assembly for correct clearance and dependable sealing.
Mahle MS 4.390in+ .005in 1.5 1.5 3.0 mm File Fit Rings
