Excuse my ignorance, but I am still learning. So, on my 95 GT, approximately where are the catalytic converter(s) and resonator located? I ask b/c I just got a custom 2.25" catback job done (to my already sport straight-through muffler) on my car at the muffler shop and wanted to ensure that the cat converter was still there. There is still a small box through the exhaust system that has three big indented lines through the bottom of it and is like 7" long and 4.5" wide, and is located just under the dashboard area. Is this a cat converter?

I believe they took the resonator away, and that used to be near the middle of the car(?). Is this where the resonator would be?

THANKS! >>

it's cat, then res. about 2' part...and the car is about a foot from the end of the downpipe