This Powermaster 82156 PowerGEN Alternator is a top-of-the-line product that fits 56-57 Thunderbird models. It is a reliable and durable power source for your vehicle, with a voltage of 6V and an amperage of 90A. The alternator is made with high-quality materials and has a powder-coated finish that ensures long-lasting performance. In addition, this alternator comes with a 1-year manufacturer warranty, making it a great purchase for those who want peace of mind. With its performance part status and its compatibility with various car and truck parts and accessories, this Powermaster 82156 PowerGEN Alternator is a must-have for anyone who wants to keep their vehicle running smoothly.