Quick fuel carburetors are amongst the highest quality carburetors on the market. They are hand assembled and engine tested here in the USA. Carburetor has been PFTE high temperature coated for a long lasting durable finish. The BD-650 is a double pumper carburetor and features mechanical secondary and electric choke. Other standard features include billet metering blocks, billet throttle body, screw in air bleeds, high speed bleeds, idle feed restrictions, power valve channel restrictions, dual metering blocks, 4-corner idle, built-in sight glasses, tunable secondary opening rate and down leg boosters. BD-650 carburetors have 1.312" venturies and 1-11/16" throttle bore. Carburetor includes kick down linkage for Ford applications. We are a stocking Quick Fuel distributor and offer many different sizes, finishes and options so give us a call if you don't see what you are looking for.