This listing is for a set of four Ford 379651-S7-8 exhaust manifold studs, suitable for use on 1960s trucks. These studs are OEM and were made in the United States, ensuring high quality and compatibility with your vehicle. They are a direct replacement for your truck's exhaust system and are designed for vintage parts. The studs are made of durable materials and come in a set of four. They are compatible with a variety of Ford trucks and are a great addition to your collection. Please refer to the provided images and feel free to contact us with any questions. Thank you for considering this listing. These OEM Ford studs are made in the USA. These studs have 3/8" -16 -16 x 3 21/64" hex shoulder. For 1961 F100 and F250, and possibly others. Comes as shown. No returns if installed or if pieces are missing. Please review our business policies in our store for information regarding returns, shipping and warranties.