Holley Sportsman Model 4500 Dominator Carburetors

Holley Sportsman Model 4500 Dominator carburetors feature the patent pending new Holley Gen 3 main body, which is 5/16 in. taller than the previous generation! This new height allows for larger radius air entries to deliver smoother flow—which equates to improved throttle response and consistency. An extended air cleaner flange is incorporated for easy air scoop attachment when using the available air scoop adapter. Other features include all-aluminum construction, tunable billet metering blocks, throttle position sensor mounting points, and knurled (hand adjustable) curb idle screws. Each calibration has been dyno and track tested to deliver proven performance! Key features of the Holley Sportsman Model 4500 Dominator carburetor: * All-aluminum construction saves 3.8 lbs. over original models * Shiny with billet aluminum metering block and black hardware * Designed for use on Drag racers, 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 and 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, and idle feed restrictors) * Dual 50cc accelerator pumps provide the perfect amount of fuel from idle to full throttle * 4-corner idle allows you to precisely control your idle system * Clear sight windows on fuel inlet side of bowls for easy and safe fuel level adjustments * Notched float and jet extension are installed * 5/8-18 in. inlet threads offer a large variety of plumbing options (uses standard 4500 fuel inlet spacing) * Factory-ready TPS mounting points for use with data acquisition systems * Knurled primary and secondary curb idle screws allow for easy idle adjustment without the use of tools * Contoured hex head squirter screws for streamlined airflow * Progressive secondary link installed for perfect off-the-line launches; no linkage parts under the carburetor (1:1 wire link included in kit) * 100 percent wet-flow tested by Holley technicians to assure carb arrives ready to run * Compatible with the Gen 3 Dominator 4-hole billet spacer Show Less