Alright so my car has damage to the Cat and the Muffler which is going to cost my insurance company $2000+ inc labour which I'm hoping I'll get a payout (won't be that much but it will be something)
Now I was wondering if I went aftermarket and got my Cat and Muffler replace what sort of exhaust system would I need and what would you recommend and how much it would cost me
If it adds KW I like

I don't want it to be loud as
It has to stay legal