Tenneco Inc. designs, manufactures, and sells clean air, and powertrain products and systems for light vehicle, commercial truck, off-highway, industrial, motorsport, and aftermarket customers worldwide. It operates through four segments: Motorparts, Performance Solutions, Clean Air, and Powertrain. The Motorparts segment offers shock and strut, steering and suspension, braking, sealing, emissions control, engine, and maintenance products under the Monroe, Champion, Öhlins, MOOG, Walker, Fel-Pro, Wagner, Ferodo, Rancho, Thrush, National, Sealed Power, and other brands. The Performance Solutions segment designs, manufactures, markets, and distributes noise, vibration, and harshness performance materials advanced suspension technologies and ride control, braking, and systems protection products. The Clean Air segment offers catalytic converters and diesel oxidation catalysts diesel particulate filters burner systems lean nitrogen oxide (NOx) traps selective catalytic reduction (SCR) systems hydrocarbon vaporizers and injectors SCR-coated diesel particulate filters systems urea dosing systems four-way catalysts alternative NOx reduction technologies mufflers and resonators fabricated exhaust manifolds pipes hydroformed assemblies elastomeric hangers and isolators and aftertreatment control units. The Powertrain segment provides pistons, piston rings, piston pins, cylinder liners, valvetrain products, valve seats and guides, ignition products, dynamic seals, bonded piston seals, combustion and exhaust gaskets, static gaskets and seals, engine bearings, industrial bearings, and bushings and washers. The company was formerly known as Tenneco Automotive Inc. and changed its name to Tenneco Inc. in 2005. Tenneco Inc. was incorporated in 1996 and is based in Southfield, Michigan.