Tenneco is a company that designs, manufactures, distributes, and markets automotive products for original equipment and aftermarket customers. It operates through four business segments: Clean Air, DRiV, Powertrain, and Performance Solutions. The Clean Air segment manufactures and distributes emissions control and acoustic tuning systems such as fabricated manifolds, selective catalytic reduction, gasoline and diesel particulate filters, close-coupled catalysts, active electronic valves, etc. The DRiV segment focuses on the distribution of brand-name goods. The Powertrain segment delivers powertrain products for light vehicles, commercial trucks, off-highway, and industrial applications. The Performance Solutions segment specializes in ride performance systems such as noise, vibration, and harshness performance materials, suspension technologies, ride control, system protection, and braking.