Holley 4224 660 Center Squirters 2×4 with choke towers machined off. Hand-assembled with our Bright Zinc finish and black billet baseplates. Only available from Allstate Carburetor. These will mount inline and can be used on a cross-ram manifold as well. These carbs will come with the 660 air cleaner bridge, that is needed to mount an air cleaner. We offer these with choice of Black Blue Red or Natural Aluminum baseplates. Choose the color of the baseplate using the dropdown menu.