This precision made BHJ harominc balancer is already zero balanced and it is a direct replacement for your 1994-95 Ford Thunderbird Super Coupe. These balancers are the best on the market and we suggest you do not make the mistake of getting a lesser model from the large automotive outlets. These balancers are superior and will sustain high performance. You must use a zero balanced pulley with these units. If you have any doubt, take it to a machine shop and have it tester. Better to err on the side of caution. This comes with a free bolt and washer.