Pic. 2.198. An exhaust manifold: 1 - air-fuel ratio sensor (row 1, sensor 1); 2 - air-fuel ratio sensor (row 2, sensor 1); 3 - three-way catalytic converters
An exhaust manifold (pic. 2.198), made of stainless steel is used to improve the warm-up of the three-way catalytic converter and to reduce vehicle weight. The air-fuel ratio sensor is installed in the exhaust manifold.