i wont work. I had a Fiero, i looked into the adding bass issue, and its tough. The best bet, is to get a new little 8 inch sub to replace the factory one under the dash. Every Fiero ive ever seen the factory sub was blown, but mine still made some noise (but blown so bad noise) even with a new stereo so i know it doesnt even need to be wired. The other option (if you actually want a decent amount of bass) is to get a truck woofer, the subs built to go behind the seat in a single cab pickup, and put it behind the passenger seat with the amp behind the drivers (or vise versa).