850 CFM Billet X-treme Pro carburetor with mechanical secondary is designed for the customer looking for the edge in their high-performance application, the Billet X-treme Pro series sports a CNC machined main body. Each Billet X-treme Pro carburetor comes with our Billet high performance metering blocks, all of which have six stages of emulsion that offer a larger range of tune-ability. These metering blocks are capable of handling the varying demands of all current fuels including methanol and ethanol. To finish off this already impressive carburetor are our two-port fuel bowls or three-port high capacity Viper fuel bowls. This fully tune-able high-performance carburetor will not only demonstration bolt on power at its finest but will look good doing it.