3-5/16" Carburetor Studs. These studs are designed for mounting the carburetor to the intake. They measure 3-5/16" long and have 5/16" course thread on the intake side and 5/16" fine thread on the carburetor side. Kit includes studs, nuts and washers. Works with Holley, Edelbrock, AED, Quadrajet, Quick Fuel ect.