Video: What's inside a Catalytic Converter?
As many of you will know, the catalytic converter has been compulsory in all cars since the 70s. Its main job is to reduce the emissions which your car produces.
Many people (as I'm sure you will know) often remove the catalytic converter from their car to create more noise. While, this is slightly illegal, many car manufacturers fit sports or high flow cats to cars which are legal and create a similar effect.
Sports cats are thinner diameter and have a smoother surface, allowing the gases to flow smoother to the great outdoors which in turn, allows your engine to breathe more freely.