Check the listing for details. 610 CFM Natural Finish 4-Bbl Vacuum Secondary Carburetor Built in USA. Condition: New. Listed at 271.79 USD. 610 CFM Natural Finish 4-Bbl Vacuum Secondary Carburetor Built in USA PCE121.1006 Brand: PCE Part Number: PCE121.1006 Part Type: Carburetors Fuel: Gasoline Number of Barrels: 4 Carburetor Flange: Square bore Choke: Manual Secondary Type: Vacuum CFM: 610 Fuel Inlet: Single Carburetor Finish: Silver Ford Kickdown: No Throttle Linkage Type: Universal Quantity: Sold individually. Calculator: CFM Calculator These PCE carburetors are equipped with all-new Tru-Set needle and seats, which have eliminated the need for external adjustments. This change allows for easier 'bolt-on-and-go' performance. The floats have been factory-set for optimum fuel levels at 3 to 6 psi of fuel pressure and should never need adjustment. If you're running over 6 psi of fuel pressure, a fuel regulator is required. These carburetors also include a new, refined appearance on their float bowls, main bodies, and vacuum secondary caps. Along with having upgraded choke caps for smoother engine warm-up and better cold drivability, these carbs are also the perfect upgrades for any ride.