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850 CFM Brawler Diecast Carburetor Mechanical Secondary / Electric Choke-4150;The latest technology in air/fuel calibrations for street or race engine demands; Available in both vacuum and mechanical secondary versions to meet your needs; All models have dual inlet fuel bowls with sight glass windows for safe and easy float adjustments; Changeable idle and high speed air bleeds for easy tuning along with four-corner idle adjustment on mechanical secondary models; Performance models include billet metering blocks and throttle bodies with precision throttle shafts to ensure long term performance; Now available in a black coated finish for corrosion protection and good looks.;