What catalytic converters?

In: Catalytic Converters, Oxygen Sensors, Ford Expedition XLT [Edit categories]

Relevant answers:

What is the difference between a Catalytic Converter and a Universal Catalytic Converter?
Direct to fit Catalytic Converters come ready to install with all parts pre-welded. These are better for the DIY professional. Universal converters are cheaper, but require cutting, welding, etc....
Is upstream before the catalytic converter and downstream after the catalytic converter?
Yes
Where are the catalytic converters at?
Catalytic converters are part of the exhaust system under the vehicle. They are right after the exhaust pipes come down from the engine
What is a catalytic converter?
It is a device which causes the oxidization of any remaining hydrocarbons in the exhaust of an internal combustion engine. In other words, if you engine doesn't burn all of the gasoline, the...
Where are the catalytic converters?
if your car has duel exhaust, they should be located a foot or two away from the headers, since the exhaust heat makes them work. They have to be cut off by a mechanic, and new ones welded back on as...