Exhaust gas systems for the worldwide automotive parts market
We offer our customers both high-quality products and help in fully exploiting the potential of the existing marketing volume.

Diesel exhaust gas technology
HJS produces diesel particulate filters with a range of different regeneration options. We offer the appropriate technology to suit cars, buses, heavy goods vehicles, construction machinery and stationary engines.

Motor sport
The ongoing development of catalytic converter technology naturally led into the production of high-performance versions for motor sport. For 12 years now, HJS's motor sport department has been working with the leading teams and associations on the national and international racing scene.

Industrial silencers
As specialists for exhaust gas systems, we also rank as one of the leading manufacturers of industrial silencers. First and foremost for us is always the modular concept - and a commitment to give our customers a high level of service tailored to their individual needs.

Automotive cable assemblies
Our subsidiary company ADC Fahrzeugtechnik offers an extensive range of customized cable harness modules of different geometries - from small simple cable assembly designs through to complex cable strands.