SJG Sejong

SJG Sejong makes two core automotive components: catalytic converters, which clean harmful exhaust gases from vehicle engines, and mufflers, which reduce engine noise and vibration.

It supplies these parts to the automotive industry, sitting in the supplier tier that feeds finished-vehicle manufacturers. Listed on KOSPI, Korea's main stock exchange, the company has expanded its product scope beyond conventional internal-combustion-engine parts to include components for hydrogen fuel-cell vehicles and battery electric vehicles.