UK we may be talking about different cat components.
I don't know the full details of the cat layout in the GTA so apologies for the fuzzy wording of this post
I do still have a supersprint hi-flo cat on my car, I presume this is the primary cat.
The cat components that were disabled on my car were (I thought) earlier up the exhaust chain nearer the manifolds.
The GTA has either 3 or 4 cats I believe, I can't remember which.
It was other catalytic components than the main cat that was disabled in my case..
Cheers,
TB