Product Summary

4-Barrel Carburetor Barrels, Gasoline Fuel Type, Shiny

    Key Specs

    Carburetor Barrels4-Barrel
    Fuel TypeGasoline
    CFM750 CFM
    Carburetor Flange Type4-Barrel Square Bore

    Need To Know

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    Holley Ultra XP Circle Track carburetors are 38% lighter than the original HP, have fuel capacity that is 20% greater and 30 other new features! Holley Ultra XP Carburetors are specifically calibrated for Circle Track & offer new features such as anti-siphon valve in the main body; high capacity HP bowls which feature 20% more fuel capacity to eliminate starvation, integrated fuel shelf to minimize fuel aeration and internal baffling to control fuel slosh. Other features include all aluminum construction, fully tunable billet metering blocks, billet base plate, wedge floats, adjustable secondary linkage and knurled (hand adjustable) curb idle screws. Holley Ultra XP carburetors are the ultimate in square bore race carburetors!

    • Shiny with black anodized billet aluminum metering blocks and base plate
    • Calibrated specifically for use on circle track
    • Has a set screw in the base plate for wide open throttle stop adjustment
    • PTFE coated throttle shafts rides in oil impregnated bronze bushings for smooth throttle actuation
    • Anti-siphon valve in main body to reduce pump pullover
    • Contoured venturri inlet offers balanced airflow for increased horsepower
    • Air bleeds moved outward to allow a smoother transition of airflow from the top of the carburetor into the venturii
    • Dual 30cc accelerator pumps provide the perfect amount of fuel from idle to full throttle
    • Fuel bowls provide 20% more fuel capacity while controlling slosh with internal baffling
    • Clear sight windows on both sides of bowls for easy and safe fuel level adjustments
    • Built in drain plug in front center of bowl provides easy access to empty contents of bowl
    • -8 (o-ringed) inlet threads offer a large variety of plumbing options and can be plumbed from either side; comes from the factory with 8AN inlet fittings
    • Knurled (hand adjustable) primary and secondary curb idle screws allow for easy idle adjustment without the use of tools
    • Primary throttle shaft capped to prevent entry of debris & contaminates
    • Factory machined accessory mounting hole for easy addition of adjustable primary throttle stop. New secondary pump cam lever designed to provide positive throttle stop on secondary side
    • Set up with 1:1 throttle actuation
    • Baseplate designed with a boss that can be consumer machined for vacuum source
    • Includes wedge floats
    • 100% wet-flow tested by Holley technicians to assure it arrives ready to run


    CARB Warning

    For race/ off road use or for use on pre-1966 vehicles.

    Emissions warning: this part only legal for sale or use in California for racing (competition) vehicles which may never be used, registered, or licensed for use upon a public highway, or if installed in vehicles model-year 1965 or older; motorcycles model-year 1977 or older; or off-highway recreational vehicles (such as off-road motorcycles and all-terrain vehicles) model-year 1996 and older. Any other use renders the vehicle tampered and not legal for use on California public highways (any public street or roadway, public dirt road, public park, or publicly maintained right of way open to the use of the public for vehicular travel). Violations subject to $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and the laws of all other states with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine.


    MFG. Part #0-80813BKX
    Carburetor Barrels4-Barrel
    Fuel TypeGasoline
    CFM750 CFM
    Carburetor Flange Type4-Barrel Square Bore
    Choke TypeNo Choke
    CFM Range700-799 CFM
    Material TypeAluminum
    Secondary TypeMechanical
    Fuel Inlet TypeDual
    New or RemanufacturedNew
    BoosterDown Leg
    Number of Circuits2
    Emission Code3
    Supercharged ApplicationNo
    Throttle Bore="1.688""
    Venturi Diameter1.250 Inch
    Bolt Hole Pattern5.160" x 5.625"
    GTIN Code090127720950
    Sold in QuantityEach