Question about cats before tuning

[Pumba83]

Naaf can u give me some prices for some high flow cats delivered and or fitted in bunbury?

 

[Brett_jjj]

Catalytic converters dont actually produce a smell when theyve been gutted, this "rotten egg" smell is actually produced by the catalyst in side the converter when its working, this is why brand new cars exhausts smell so badly of rotten eggs. A lot of people actually complained to car makers about the "rotten egg smell" back when unleaded fuel and catalytic converters were introduced on vehicles here in oz, this smell was especially bad with the first unleaded vehicles produced but the smell slowly goes away as the catalyst wears.

 

[Not_An_Abba_Fan]

The smell I am referring to is the smell of an exhaust without a cat or a non working cat. It is very distinctive. If the car is supposed to have an cat and it doesn't, you can tell straight away by the rich fuel smell of the exhaust. With a working cat, they smell completely different.

Wasn't referring to the "rotten egg" smell at all.