The only "kits" made for our car are the cat-backs made by Dynomax, Flowmaster, and Borla (I think?) and the full system made by SCP. As far as headers, there are only 2 companies that make headers specifically for the T-Bird, those being JBA and Kooks, but they are very pricey pieces. Some Mustang headers can be made to fit with modification to the steering shaft or other things. Bottom line is if you want an exhaust for your car you are most likely going to have to rig up something custom.