Tenneco, Inc. engages in the design, manufacture, market and sale of innovative clean air, powertrain and ride performance products and systems. The company is headquartered in Skokie, Illinois and currently employs 71,000 full-time employees. The firm operates through four segments: Motorparts, Performance Solutions, Clean Air, and Powertrain. The Motorparts segment designs, manufactures, sources, markets, and distributes a portfolio of brand-name products in the global vehicle aftermarket while also servicing the original equipment service (OES) market. Its Motorparts products are marketed and sold under brand names, including Monroe, Champion, MOOG, Walker, Fel-Pro and others. The Performance Solutions segment designs, manufactures, markets, and distributes a variety of products and systems designed to optimize the ride experience. The Clean Air segment designs, manufactures, and distributes a range of products and systems designed to reduce pollution and optimize engine performance, acoustic tuning, and weight on various vehicles.