Product Summary

2-Barrel Carburetor Barrels, Gasoline Fuel Type

  • Features a die-cast aluminum fuel bowls with internal baffles that eliminate slosh
  • Bowls have an integrated fuel chute that substantially reduces aeration, and directs fuel toward the main jet pickup area
  • Proprietary booster design enhances carb signal without restricting high-rpm airflow
  • Designed to work with both gasoline and alcohol applications
  • Carburetors are equipped with roller bearing seals which provide smoother throttle response, less wear on shaft, and longer life

Rebates Available

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Key Specs

Carburetor Barrels2-Barrel
Fuel TypeGasoline
Choke TypeNo Choke
CFM Range500-599 CFM
CFM500 CFM
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Need To Know

Quick and Easy Returns

Return Policy

Quick Fuel Technology Q-500-CT Details

While modifying a street carburetor for circle track applications can work reasonably well, Quick Fuel Technology's Q-Series circle track carbs eliminates the guesswork and offer substantial advantages in adjustability, consistency, and predictability. Since racing around a banked oval pushes fuel to the passenger side of the car, Q-Series circle track carburetors feature die-cast aluminum fuel bowls with internal baffles that eliminate slosh. The bowls also feature an integrated fuel chute that substantially reduces aeration, and directs fuel toward the main jet pickup area. To assist in flattening out the fuel curve, screw-in air bleeds enable fine-tuning of both the low- and high-speed systems, while a proprietary booster design enhances carb signal without restricting high-rpm airflow. Helping drivers put the power down is an adjustable QuickLink system that allows changing the opening rate of the secondaries to 40-, 60-, or 100 percent. Circle track Q-Series carbs are available in 6 different sizes ranging from 650-1,050 cfm for both gasoline and alcohol applications. All Q-Series circle track carburetors are equipped with roller bearing seals which provide smoother throttle response, less wear on shaft, and longer life.

Charts

Rebates

Holley October Promo 10% Off Select Parts Sale

Holley October Promo 10% Off Select Parts SaleHolleyOctoberPromo10%OffSelectPartsSale

Holley's October Promo 10% Off Select Parts Sale, running from September 28, 2026, through November 1, 2026. For a limited time, customers can save up to 10% off on select Holley parts, making it the perfect opportunity to upgrade your ride with premium Holley branded parts including Holley, Brawler, Quick Fuel, Leg Wheels, Rev Wheels, Rocket Racing, Flowtech, Edge, Racequip, Apr and Dinan. Purchases must be made between September 28, 2026, through November 1, 2026. This limited-time offer applies to qualifying Holley branded parts purchased during the promotional period. Following the promotion, these parts will revert back to standard pricing.

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.

Quick Fuel Technology Q-500-CT Specifications

KEY SPECS
MFG. Part #Q-500-CT
BrandQuick Fuel Technology
Carburetor Barrels2-Barrel
Fuel TypeGasoline
Choke TypeNo Choke
CFM Range500-599 CFM
CFM500 CFM
Carburetor Flange Type2-Barrel 4-Bolt
FinishNatural
Material TypeAluminum
ColorSilver/Red
Secondary TypeNone
Fuel Inlet TypeSingle
Gasket(s) IncludedYes
New or RemanufacturedNew
Throttle Linkage TypeUniversal
Supercharged ApplicationNo
GENERAL
Boosterstraight
Bolt Hole Pattern5.160" x 3.460"
Carburetor Height3.25
GTIN Code849804000713
Sold in QuantityEach

Ratings & Reviews

4.3

6 Reviews

Overall Assessment

Customers consistently praise the product's high quality and usability, particularly its easy installation and minimal need for adjustment. The carburetor is considered superior in its class, making it a preferred choice. One noted discrepancy is the lack of advertised screw in style air adjustments, although this did not dramatically affect the overall positive perception. Customers would buy again, demonstrating their satisfaction and confidence in the product's performance.

4.3

6 reviews

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Filter by Ratings

Product not as good as the original ones they used to make w

1.0

3 months ago

Dirt track racer

South Alabama

Verified

They use to send a build card with didn't have one in the box float level was not set and jets were more for a stock engine not performance like advertised

Would Not Recommend

i would buy again

5.0

9 months ago

sam

ind.

Verified

product worked as described

Would Recommend

Yes I would buy again.

5.0

4 years ago

Mark

Baton Rouge

It's a good quality carburetor, there's really nothing above it in the class I run.

Would Recommend

Almost as described - Nice carb!

5.0

5 years ago

ME7D

Ohio

Verified

This bolted on out of the box and ran with minimal adjustment. I did have to change jets and power valve to match my motor but it did fire up and run right out of the box. This does NOT have the screw in style air adjustments as stated though. That is the only complaint from me as it stated in the description that it came equipped with them.

Would Recommend

Yes I would buy again

5.0

5 years ago

Mark

Baton Rouge La.

Great Carburetor

Would Recommend

Greta product fast shipping

5.0

6 years ago

Duffy

Tonopah nevada

Verified

Just what I needed

Would Recommend

Showing 6 of 6 reviews

Questions & Answers

1 Question • 1 Answer

What is part number for a full rebuild kit for this?

by Rory

• 2 years ago

1 answer

1 of 1 questions shown

Customer Impersonation Script