Description Mark IV Industries aims to hit the mark; its ammo includes engineered components and systems used in the automotive, industrial, and transportation industries. Business units include Air Intake & Cooling and Power Transmission for automotive and transportation applications. The company designs and manufactures timing belts, as well as air intake and water cooling components and air and water ducts. Mark IV sells to OEMs and aftermarket parts suppliers in the Americas, Asia, and Europe. It divested its Intelligent Vehicle Highway Systems and Luminator Technology units in 2010.