310-4188: 138mm Gage Diameter Piston Top Ring
Description:RING-PISTON TOP | Engine:C15 | Application:365C, 365C L, 365C L MH, 374D L, 374F L, 583T, 587T, 621B, 621G, 623G, 627F, 627G, 631D, 637D, 651B, 657E, 657G, 735, 735B, 740, 740B, 770, 770G, 773G, 775G, 824C, 824H