ACS Industries
Catalytic converter and particulate filter support meshes—Compressed wiremesh seals—Wiremesh products for automotive and industrial applications
BASF Catalysts LLC
Emission control catalysts—Diesel particulate filters—Zeolite and vanadium based SCR catalysts
CPK Automotive GmbH
Aftertreatment control & monitoring—Active regeneration & HC dosing—Data logging
DCL International
Metallic catalyst substrates—Catalyst coating—Substrate canning and exhaust system assembly
Ecocat Oy
Emission control catalysts—Metal substrate catalytic converters for automotive and stationary engines—Industrial VOC emission control
Emitec Inc.
Metallic catalyst substrates
Haldor Topsøe A/S
SCR catalysts—Ammonia slip catalysts—DPF catalysts—Oxidation catalysts
Johnson Matthey
Diesel and automotive catalysts—Catalytic mufflers—DeNOx and SCR catalysts for stationary engines—Industrial VOC control catalysts
LiqTech A/S
Silicon carbide (SiC) diesel particulate filter substrates

MEL Chemicals
Zirconium chemicals for emission control catalyst applications
ServoTech Engineering
Control systems for SCR catalysts and particulate filters—Urea dosing systems—Emission testing and R&D
Umicore Automotive Catalysts
Diesel and automotive catalysts—SCR catalysts—Lean NOx catalysts—Diesel Particulate Filters