Just because your Ford Thunderbird is a bit older does not mean it is slower or does not handle as well as newer machines. But it does mean that you need to pay closer attention to be sure that every component is in proper working order. Two parts that often go overlooked are catalytic converters and oxygen sensors. When one of the pair fails the other is soon gone as well. So always make sure your entire exhaust system on your car is in perfect running order. At some point in time you may have to replace a worn out catalytic converter. If your car is running sluggishly or if your gas mileage has dropped dramatically, the cause could be a bad catalytic converter. Replace it as soon as you can with a new Eastern Catalytic Converter. That is a sure way to get back the punch, power and performance you have come to expect with your car. And your fuel economy will improve at the same time. Keep your car in tip top shape. Install a new Thunderbird Catalytic Converter and you will be well on your way. Why wait? The highway is calling you. Customers always deserve outstanding customer service when they buy good quality auto parts for a car or truck. Because you deserve that, we've built a round-the-clock help call bureau to answer your questions. If you spot a lower price elsewhere, give us a call - we always beat any legitimate auto part price.