In Germany: If the catalytic converter already installed is older than 5 years or has clocked up more than 80,000 km (50,000 miles), it has to be replaced when an HJS City-Filter® is fitted. This is stipulated in the relevant german legislation. For this reason, HJS offers a combi filter, with either an integral oxidation catalytic converter or a catalytic coating, for a large range of vehicle models.
Other rules can apply in other countries.
Last update on 2013-07-05 by Dominique Winkler.