HK-MnS Co., Ltd. is a leading supplier of Diesel engine after-treatment systems such as Active regeneration DPF system and DOC equipped with plasma reactors for on-road, off-road vehicles and Railway vehicles in Korea. HK-MnS was founded in 2006 with an investment from Hyundai Motor Company and Catalyst Company. The goal of HK-MnS is to harmonize technologies with the environment by developing new environment-friendly technologies.