Gas-conveying line, in particular for an internal combustion engine

It is proposed with a arranged in the exhaust system the exhaust gas catalyst is a gas-conducting line section (1), in particular an exhaust manifold for an internal combustion engine and an internal combustion engine. According to the invention, the line section (1) an at least partially applied to the inner wall porous insert (2), preferably in the form of a sintered molding, which forms a freely flowed through the hollow body; the internal combustion engine according to the invention has in its exhaust system upstream of the catalytic converter disposed therein on a line section, which in particular contains a free flow-through porous sintered molding. Application particularly in motor vehicles with internal combustion engines.