Mann+Hummel Group is a German manufacturing group headquartered in the area of Stuttgart. The company specializes in products for the distribution and filtration of liquids and air. Products include oil filters, engine air filters, cabin filter, intake systems and thermal management parts. Mann+Hummel also specializes in powertrain and engine plastic components, such as manifolds, ducting and cylinder head valve covers. These products are offered to the automotive industry under the brands Mann-Filter, Wix Filters, Filtron, and Purolator.