Holley 0-90670 Model 4150 Truck Avenger 670 CFM Square Bore 4-Barrel Vacuum Secondary Electric Choke Carburetor 1-piece off-road vent tube eliminates fuel spillover during extreme maneuvers Dual feed fuel inlet with adjustable vacuum secondary for fuel economy and acceleration Dichromate finish with 4 vacuum ports Built-in fuel inlet filter and transfer tube seal Limited lifetime warranty