Catalytic Converter for Saab 9-2X 2.5L H4 2006 EPA Direct Fit 642803 674864

The exhaust gas of the engine flows through the small hole, and there is a layer of rare metal on the inner wall of the small hole. The harmful components in the exhaust gas undergo an oxidation-reduction reaction under the catalysis of high temperature and rare metal, and eventually turn into harmless substances and are discharged.