Villager V6-201 3.3L SOHC VIN T SFI (1999)
The TWC reduces the air pollutants HC, CO, and NOx. The TWC removes these pollutants from the exhaust gases by means of a chemical reaction. The
remaining gases are transferred to the muffler.
The catalyst metals are thinly coated onto and supported by a honeycomb shaped high temperature ceramic, mounted inside the converter shell. The
result is a highly effective converter design having minimum restriction to exhaust gas flow and good durability.
Warm Up Three Way Catalytic Converter (Federal Emissions)
The Warm Up Three Way Catalytic Converter (WU-TWC) is designed to reduce HC, CO, and NOx during warm up conditions.
The WU-TWC is mounted ahead of the TWC, causing it to warm up faster upon vehicle start up. This results in less air pollutants escaping during warm
up.
Pre-Catalytic Converter
Pre-Catalytic Converter (California Emissions)
The pre-catalytic converter is designed to reduce HC, CO, and NOx.
The pre-catalytic converter is mounted ahead of the TWC, causing it to warm up faster upon vehicle start up. This results in less air pollutants escaping
during warm up.
