Supsan, a Borusan Holding company, has been producing engine valves for all kinds of internal combustion engines under the license of Eaton SRL since September 3, 1970. Supsan is the original part supplier of car manufacturers for engine valves, valve guides, valve cotters, push rods and valve caps. Supsan who has started the production of camshaft and turbo charger in its own facilities in 2014 also distributes engine valves, valve guides, valve inserts, valve cotters, push rods, gasket sets, camshafts, valve lifters, cylinder heads, cranks, valve shims, valve seals, cylinder head bolts, engine bearings, turbo chargers, EGR valves, air flow meters, valve springs and timing chains through its aftermarket channels. The conformity of its quality management system to ISO / TS 16949 requirements is approved by a TÜV CERT, an international auditing institution.
Supsan is the leading producer of Turkey in its field. The engine valve needs of Ford Otosan, Oyak Renault, Tofaş, Türk Traktör, Iveco, Uzel, Anadolu Isuzu, Başak Traktör, Pancar Motor, BMC, Karsan, Otokar, Daf Tırsan, Yavuz Mühendislik and Temsa are supplier by Supsan.
Foreing customers of Supsan are Ferrari, Mercedes Benz, BMW, Aston Martin , Bentley, Porsche, Volkswagen, Fiat, JCB, Ford, Iveco, Daf, Volvo, Renault, Dacia, Nissan, Peugoet, Volvo Penta, Isotta Fraschini, VM Motori, Detroit Diesel, GM, Chrysler, John Deere.