Welcome to the board!!!
I don't think any cat back or even axle back exhaust is transferable to the sol. Maybe one from a hatch, but I'm almost possitive that it's too long. Check part numbers from online stores and see if they match.
It'll give you a few more horsepower. It's a lot less restrictive, as far as airflow, than the stock one. I've experienced improved gas mileage in all my cars, but I'm not sure if that's always the case.
Good Luck!!! :thumbup: