Pre/Main Catalytic Converters

2673 - Pre-catalytic Converter
2676 - Main Catalytic Converters

The use of modern catalytic converter technology with ceramic pre and main converters ensures optimum emission control values and reduced weight, as-well-as greater temperature durability. Front pipe insulation between the pre and main converter shortens the light off time of the main converters and limits the level of heat radiated into the luggage compartment.

In order to ensure that the pre-catalytic converter is heated up rapidly and that the conversion of pollutants begins quickly (the converters light off point has been lowered to approx. 660 °F/350 °C), the pre-catalytic converter is relatively small, with a diameter of approx. 102 mm and a length of approx. 75 mm. The downstream main catalytic converter, which has been integrated in the main muffler for reasons of space, has a diameter of 118 mm and a length of 90 mm.