750 CFM - Mechanical Secondaries - Black - Gasoline - No Choke. Built for serious street/strip and bracket combos, this 750 CFM Brawler Race features a lightweight aluminum main body with a stealth black coating, plus red billet metering blocks and a billet throttle body for rock-solid shaft stability. Mechanical secondaries give a direct, immediate feel off the pedal, while modern air/fuel calibrations keep mixtures stable from launch to stripe. Deep tunability—jets, replaceable idle and high-speed bleeds, and four-corner idle—lets you tailor crisp throttle response and strong mid-range. Precision-machined and hand-assembled in the USA.. This model of carburetor has the square bore flange bolt pattern. It can replace Holley, Edelbrock, Carter AFB, and Autolite style carburetors with 5.