Ahlstrom-Munksj?
Brackett Aero Filters Inc. Cummins Inc. Denso Corporation
Donaldson Company Inc. Freudenberg & Co. KG
General Motors Company
Hengst SE
K&N Engineering Inc. Mahle GmbH
Parker Hannifin Corp
Porvair Filtration Group (Porvair plc)
Sogefi SpA and Toyota Boshoku Corporation