Edelbrock 2021 Single-Quad Manifold and Carb Kit for 1957-1986 Small-Block ChevySingle Quad Manifold and carb Kit for 1957 86 Small Block Chevy The Edelbrock #2021 Single Quad Manifold and carb kit is designed for 1957 86 Small Block Chevy applications. With a Manifold and Carb Kit, it's easy to upgrade your induction system with the best combination of Edelbrock proven performance and looks in a single box. These kits include: an Edelbrock manifold, Performer or Thunder Series AVS carb, chrome fuel inlet, intake gasket set,