Exhaust System
WARNING: This page is about a different car, the 2007 Suzuki SX4. However, it is still accessible from the selected car via links, so may be relevant.
The exhaust system consists of the exhaust manifold, exhaust No.1 pipe with WU-TWC (Warm Up Three Way Catalytic Converter), exhaust No.2 pipe and exhaust center pipe with TWC (Three Way Catalytic Converter), muffler, seal, gasket and etc.
The WU-TWC and TWC are an emission control device added to the exhaust system to lower the levels of Hydrocarbon (HC), Carbon Monoxide (CO), and Oxides of Nitrogen (NOx) pollutants in the exhaust gas.