If there is an icon in the performance world, it has to be the Holley four-barrel carburetor. The beauty of the Holley is that from a plain-Jane 600-cfm to a 1,050-cfm Dominator, all Holley carburetors work the same way. Better yet, its modular design makes the Holley exceptionally easy to work on. Basically, if you can fog a mirror, you can rebuild a Holley. Given that, we’ve assembled a step-by-step rebuild tour through a typical Holley vacuum-secondary four-barrel carburetor. So grab your wrenches and screwdrivers and let’s get started. Oh, don’t forget the fender covers.