QUICK FUEL TECHNOLOGY 680CFM Carburetor Hot Rod Series P N HR 680 VS tachometer adapters or build your own nitrous D290 0463 B or build your own nitrous system The E Core design of the HVC Coil is more efficient in producing more output with less loss Barrels 4 Billet Color Diecast No Billet Booster Down Leg Brand Quick Fuel Carburetor Use Street CFM 680 Choke Electric Circuit 2 Condition New Emission Code 3 Finish Shiny Fuel Gasoline Fuel System Carbureted High Speed Air Bleed 28 Idle Air Bleed Size 70 Marine Use No Material Aluminum Model HR Series Primary Main Jet 70 Primary Power Valve 65 Primary Pump Nozzle Size 31 Product Type Carburetor Secondaries Vacuum Secondary Main Jet 74 Supercharged Application No Throttle Bore 1 11 16 inch Warning California Proposition 65 Warranty Limited 90 Day The Hot Rod Series is a versatile performer designed for the most discerning street enthusiast