Welcome! Glad to see people still look into buying these vehicles
Definitely a great choice with AP exhaust. I've had it for about 5yrs and going strong. Cannot get enough when it sings, its addictive! Before installing, I ceramic coated every component very thoroughly (except the tips). There was a bit of drone at low rpm, but over time it has lessened quite a bit, or I've gotten used to it lol
But you won't regret the exhaust thats for sure. Post some pictures, it'll be great to see what you're building. I also changed the to Hawk HPS5.0 pads and DBA T3 4000 "kangaroo paw" rotors all around - which I recommend if you haven't already.
Don't get your hopes up on the dyno, the gain may have been noticeable on a miata, but not this beast.. You may get a smoother curve though.
What audio upgrade do you have planned?