750 CFM BRAWLER RACE CARBURETOR MECHANICAL SECONDARY (Black) #BR-67331The 750 CFM Brawler Race Carburetor (Black) Mechanical Secondary (Part #: BR 67331) is purpose built for racers and high performance street cars. With its aggressive fuel delivery system and no choke design, this carb is ideal for bracket racers, track cars, and big power naturally aspirated builds. This 4150 style square bore carburetor features mechanical secondaries, billet metering blocks, four corner idle system, and adjustable high speed air