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Product Summary

4-Barrel Carburetor Barrels, Gasoline Fuel Type, Shiny

  • It is calibrated specifically for use on circle track
  • Includes an anti-siphon valve in main body to reduce pump pullover
  • Has a set screw in the base plate for wide open throttle stop adjustment
  • Features a shiny with black anodized billet aluminum metering blocks and base plate
  • The metering blocks feature improved durability, true gasket sealing and are fully adjustable

Key Specs

Carburetor Barrels4-Barrel
Fuel TypeGasoline
CFM650 CFM
Carburetor Flange Type4-Barrel Square Bore
FinishShiny

Need To Know

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Details

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
  • Metering blocks feature improved durability, true gasket sealing and fully adjustable (emulsion bleeds, power valve channel restrictors & idle feed restrictors)
  • 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) female inlet threads offer a large variety of plumbing options and can be plumbed from either side; includes 2 ea -8 AN o-ring male port to -6 AN male fittings
  • 4 corner idle allows you to precisely control your idle system
    Internal pump passage in metering block equipped with a tunable bleed off for further tuning of accelerator pump
  • 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
  • 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

Charts

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.

Specifications

KEY SPECS
MFG. Part #0-80812BKX
BrandHolley
Carburetor Barrels4-Barrel
Fuel TypeGasoline
CFM650 CFM
Carburetor Flange Type4-Barrel Square Bore
FinishShiny
GENERAL
Choke TypeNo Choke
CFM Range600-699 CFM
Material TypeAluminum
ColorBlack
Secondary TypeMechanical
Model4500UHP
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 Code090127720936
Sold in QuantityEach