850 CFM Brawler Race Carburetor Mechanical Secondary -4150; Brawler Race carburetors are machined and assembled by craftsman right here in the USA. These carburetors work hard just as their name implies- just raw bare knuckled performance that you can rely on. Brawler performance development started with a high flowing diecast aluminum main body and added purple billet aluminum metering blocks with the latest technology in air/fuel calibrations for today s race engine demands. They also come with purple billet aluminum throttle bodies for superior durability and throttle shaft stability. Brawler Race models offer all of the options and tunability that you would find from more expensive carburetors in the market including changeable idle and high speed air bleeds as well as four-corner idle adjustment on all mechanical secondary models.;