Welcome along.
Didn't the later cars have 3 cats? Down pipe, centre and a small cat on the up pipe?
As jay said, the cone filter will give you much more of a sucking noise it's a kind of constant gurgling noise that increases as you put your foot down. You can really only hear it with the windows open.
The recirc doesn't really give any noise off in my experience, however something like an HKS bov will give you a great loud whoosh every time you come off boost and if you are running a full decat exhaust this will be accompanied by lots of pops and farts from the exhaust on over run.
I had an HKS green mushroom induction kit, HKS bov, and a full stainless steel decat with a Scoobyworld Afterburner Vortex exhaust. More than enough to create all the gurgling, whooshing and popping you'll need. I drowned out a Mustang V8 at a car show once with that set up :D
I was good for at least 108db.
Also check out if there are any local meets, well worth popping to one to meet other like minded people, although I'm not sure if you'd want to like mined with Gambit, he's a bit of a nutter tbh :p