650 CFM - Mechanical Secondaries - Black - Gasoline - No Choke. Track-day ready without the boutique price, the 650 CFM Brawler Race features lightweight aluminum construction and race-oriented calibrations that keep mixtures stable under hard launches and sustained rpm. Mechanical secondaries and extensive adjustability (air bleeds, jets, four-corner idle on mech-sec models) let you fine-tune for sharp 60-foots and clean top-end pulls. Precision-machined, hand-assembled in the USA, and built to take repeated heat cycles and quick turnaround tuning.. This model of carburetor has the square bore flange bolt pattern. It can replace Holley, Edelbrock, Carter AFB, and Autolite style carburetors with 5 3/16" x 5 5/8" bolt pattern. If you have a spreadbore style intake manifold, you will need an.
