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The Mahle file-fit piston ring set for a 4.155 in. bore (+0.005 in) includes 0.043 in. top and second rings and a 3.0 mm oil ring for final gap-matching and precise sealing. Supplied for builders who finish bores and hand-fit rings, the set supports accurate end-gap control and reliable seating during engine reassembly without assuming specific materials beyond the supplied specification.
Mahle MS 4.155in+.005in .043in .043in 3.0mm File Fit Rings
