Bilen Exhaust Systems, founded in 1954, is a global supplier of exhaust systems and special steel part applications for automotive, defense, agriculture and construction industries. The company also provides exhaust systems engineering, design and testing services. Bilen manufactures silencers, exhaust and special tubes, insulated tube parts (MEI), exhaust aftertreatment systems and formed steel parts. The production facility is located at Düzce Industrial Zone, located midway between İstanbul and Ankara, at an approximate distance of 200 km from both cities.