Umicore AC is one of the world's leading producers of catalysts used in automotive emission systems for light-duty and heavy-duty vehicles. AC’s catalysts perform in a wide range of powertrains, including gasoline and diesel engines, natural gas, and alternative fuels, and are increasingly important in engines supporting mild and full hybrid vehicles. Focusing on superior technology, AC develops tailor-made solutions together with its customers, helping them to produce more fuel-efficient vehicles meeting present and future requirements of environmental legislation.