Heartagram131
Go Kart Champion
Honestly I don't know where the cat is lol, but there is a resonator right in the center of the car and the exhaust shop cut down the catback a little bit to connect to that. I think most people get rid of that when they do the swap and they have a piece of straight pipe connecting instead which I'm assuming is connection to the cat.
Yes! That resonator in the centre is why it's quiet.