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The Mahle file-fit piston ring set for a 4.040 in bore (+0.005 in) contains 1.0mm top, 1.0mm second and 2.0mm oil rings. Designed for rebuilds, the rings are supplied oversize so installers can file end-gaps to match individual cylinder bores. This file-fit format supports correct ring-to-bore contact and controlled seating during break-in.
Mahle MS 4.040in +.005in 1.0mm 1.0mm 2.0mm File Fit Rings
