750 CFM 4-Barrel HP Series Race Carburettor - Methanol HO0-80535-1750 CFM 4 Barrel HP Series Race Carburettor MethanolProgressive Secondaries. No Choke. Double Step Down Leg Boosters HO0 80535 1 0 80535 1 Performance calibrated and race ready out of the box, Holley HP Series carbs have become the standard in race carburettors. Designed for use on race engines Progressive Secondaries Dual 30cc accelerator pumps Calibrated for methanol Dual fuel inlets 4 corner idle Screw in air bleeds Double step, down leg boosters