... Phosphated, Nitrided,Chrome plated 3.ISO9002, QS9000, TS16949 engine piston ring set OEM manufacturer 1.Dia from 90mm--- ... years. DWIT products:Piston ring, piston, engine bearing, cylinder liner, liner kit, engine valve, valve seat and guide, thrust ... Toyota, Daewoo, Hyundai, Kia, Volvo, Benz, MAN, DAF, Iveco, Fiat, Mazda, Opel, Suzuki, etc. DWIT promisesGood qualityCompetitive priceSecure serviceFast ...