The Mahle OE plain ring set is a top-ring replacement pack with plain-type rings sized for a 4.285 in bore and a 1/16 in edge width, supplied as a matched set. Intended for engine rebuilds or ring replacement, these rings offer a factory-style plain ring option for sealing and wear control in compatible bores without asserting additional performance claims beyond the supplied dimensional specifications.
Mahle Rings 4.285in Bore Dia 1/16in PC479 Top Rings Plain Ring Set