1050 CFM - 4500 - Mechanical Secondaries - Shiny - Gasoline All aluminum construction saves 3.8lbs. over original models (28% weight savings) Shiny with billet aluminum metering block and black hardware Designed for use on Drag race, Pro Street, or any high horsepower engines Calibrations optimized for today's race engines and new fuels Fully machined from venturi throat to throttle bore for predictable & repeatable performance Annular boosters deliver excellent signal and throttle response Screw in air bleeds offer precise tuning capabilities Metering blocks feature improved durability, true gasket sealing and adjustability ( power valve channel restrictors, intermediate restrictors &...