This is a high quality long stud that will be needed if you add a carburetor spacer under your carb. This is usually something that you will forget up until you set that carb on and the bolts are too short. So pick up a set today and have them ready. These zinc-plated studs help prevent stripped out threads in your aluminum intake manifold, hold the gasket in place and guide the carburetor on. Includes 4 studs, nuts & washers. Extra long 2-1/2 inch length.