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The Mahle Plain Second Ring set fits a 4.0850" bore with a 1/16" edge width and is constructed from grey iron for second‑ring service. Second or intermediate rings control combustion sealing and help manage oil scraping behind the top ring, contributing to compression retention and ring pack stability during break‑in and normal operation for engines matching the stated bore size.
Mahle Rings 4.0850 Bore Dia 1/16in Edge Width Grey Iron THG Second Ring Plain Ring Set
