Founded in 1974 in İstanbul's Sefaköy district, Supsan manufactures valves and valve components for internal combustion engines under license from Eaton Automotive SrL.

Supsan leads the original parts and spares market with a nearly 60 % market share; and is the principal supplier of major automobile, truck and tractor producers including Otosan, Tofaş, Renault, Uzel and Türk Traktör.