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Demon Fuel Systems 625 CFM Street Demon Carburetor 1901

Demon Fuel Systems 625 CFM Street Demon Carburetor 1901
Demon Fuel Systems 625 CFM Street Demon Carburetor 1901Demon Fuel Systems 625 CFM Street Demon Carburetor 1901Demon Fuel Systems 625 CFM Street Demon Carburetor 1901Demon Fuel Systems 625 CFM Street Demon Carburetor 1901Demon Fuel Systems 625 CFM Street Demon Carburetor 1901Demon Fuel Systems 625 CFM Street Demon Carburetor 1901Demon Fuel Systems 625 CFM Street Demon Carburetor 1901
$705.99 ea
NEWARRIVING SOONEstimated Ship Date 05/21/2025 (If Ordered Today)99 Available from HOLLEY PERFORMANCE PRODUCTS as of 05/01/2025
Model: 3998671
Select a Vehicle or refer to the Vehicle Fitment Tab below to verify that this part fits your vehicle.
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WICKED POWER! The ALL NEW Street Demon® redefines the street carburetor with clean looks and ease of use! The Street Demon offers enthusiasts a straight forward carburetor designed to deliver a stable idle, amazingly crisp throttle response and smooth performance. Its optimized calibration and dual mounting pattern make it Run-Ready™ for a large variety of engines and vehicles
Features:
  • Ball burnished shiny aluminum with black composite fuel bowl
  • Designed for use on most stock to mildly modified V8s
  • Developed from the ground up with smooth styling - patented timeless design fits modern as well as traditional themed vehicles (Patent No.: US D648,746 S)
  • One piece airhorn is easy to clean and maintain
  • Aerospace Composite fuel bowl offers significant heat insulating benefits over aluminum fuel bowl - keeps fuel up to 20º cooler for optimum performance with modern fuels
  • Electric Choke Management means easy cold starts
  • Dual mounting bolt pattern - fits most aftermarket spread/square bore intake manifolds without adapter
  • Integrated fuel bowl/main body design with gasket above fuel level and no plugged passages to eliminate all potential leak paths
  • Small 1-3/8” primary throttle bores combined with proven Triple-Stack™ boosters deliver amazingly crisp throttle response and drivability, superior fuel atomization and improved fuel economy
  • Goggle Valve Secondary (GVS™) throttle plate (Patent # D677755) delivers over twice the air flow of the primary bores for power you can hear and feel
  • GVS™ makes total air flow 625 CFM while maintaining the crisp throttle response delivered by small primary bores
  • 2 Stage metering rods control easily accessible without carburetor disassembly or removal
  • Single fuel inlet for simple installation
  • Integrated 700R4/200R4 transmission kickdown cable mounting location as well as Ford A/T kickdown for proper shifts
  • Patent pending mechanical design
  • 625 CFM specific calibration kit available for tuning and altitude adjustments
  • Available TPS kit allows use with 4L60 and 4L80 transmissions
This model of carburetor has the square bore flange bolt pattern. It can replace Holley, Edelbrock, Carter AFB, and Autolite style carburetors with 5 3/16" x 5 5/8" bolt pattern. If you have a spreadbore style intake manifold, you will need an adapter to install this carburetor. Similar to the Mr. Gasket #1932.
Installation Notes:
This model of carburetor has the square bore flange bolt pattern. It can replace Holley, Edelbrock, Carter AFB, and Autolite style carburetors with 5 3/16" x 5 5/8" bolt pattern. If you have a spreadbore style intake manifold, you will need an adapter to install this carburetor. Similar to the Mr. Gasket #1932.

Downloads:

Download Name File Size
techlibrary_carb_numerical_listing.pdf611.91KB
street_demon.pdf2.45MB
streetdemonarticle.pdf4.83MB
lit701rev10.pdf1.51MB
lit721.pdf36.13KB

Videos:

Vehicle Fitment:

The Vehicle Fitment Guide is to be used as a general reference. The data has been provided by our suppliers and manufacturers and may contain errors or incorrect data. Always refer to a professional to verify correct fitment for your vehicle.
Make Model Submodel Years Engine
Chevrolet Chevy II Base 1963 4.6L / 283 / V8
Chevrolet Chevy II Base 1964 4.6L / 283 / V8
Chevrolet Chevy II Base 1965 4.6L / 283 / V8
5.3L / 327 / V8
Chevrolet Chevy II Base 1966 4.6L / 283 / V8
5.3L / 327 / V8
Chevrolet Chevy II Base 1967 4.6L / 283 / V8
5.3L / 327 / V8
Chevrolet Chevy II Nova SS 1964 4.6L / 283 / V8
Chevrolet Chevy II Nova SS 1965 4.6L / 283 / V8
Chevrolet Chevy II Nova SS 1966 4.6L / 283 / V8
Chevrolet Chevy II Nova SS 1967 4.6L / 283 / V8
5.3L / 327 / V8
Chevrolet Chevy II Nova 1963 4.6L / 283 / V8
Chevrolet Chevy II Nova 1964 4.6L / 283 / V8
Chevrolet Chevy II Nova 1965 4.6L / 283 / V8
5.3L / 327 / V8
Chevrolet Chevy II Nova 1966 4.6L / 283 / V8
5.3L / 327 / V8
Chevrolet Chevy II Nova 1967 4.6L / 283 / V8
5.3L / 327 / V8
Chevrolet Chevy II Nova 1968 5.0L / 307 / V8
5.3L / 327 / V8
5.7L / 350 / V8
6.5L / 396 / V8
Chevrolet Nova Base 1969 5.0L / 307 / V8
6.5L / 396 / V8
5.7L / 350 / V8
Chevrolet Nova Base 1970 5.0L / 307 / V8
7.4L / 454 / V8
6.6L / 402 / V8
5.7L / 350 / V8
Chevrolet Nova Base 1971 5.0L / 307 / V8
7.4L / 454 / V8
6.6L / 402 / V8
5.7L / 350 / V8
Chevrolet Nova Base 1972 5.0L / 307 / V8
6.6L / 402 / V8
5.7L / 350 / V8
Chevrolet Nova Base 1973 5.0L / 307 / V8
5.7L / 350 / V8
Chevrolet Nova Base 1974 5.7L / 350 / V8
Chevrolet Nova Base 1976 5.0L / 305 / V8
Chevrolet Nova Base 1977 5.0L / 305 / V8
Chevrolet Nova Base 1978 5.0L / 305 / V8
Chevrolet Nova Base 1979 5.0L / 305 / V8
Chevrolet Nova Concours 1976 5.0L / 305 / V8
Chevrolet Nova Concours 1977 5.0L / 305 / V8
Chevrolet Nova Custom 1973 5.0L / 307 / V8
5.7L / 350 / V8
Chevrolet Nova Custom 1974 5.7L / 350 / V8
Chevrolet Nova Custom 1978 5.0L / 305 / V8
Chevrolet Nova Custom 1979 5.0L / 305 / V8
Chevrolet Nova Police 1976 5.0L / 305 / V8
Chevrolet Nova Police 1977 5.0L / 305 / V8
Chevrolet Nova Police 1978 5.0L / 305 / V8
Chevrolet Nova Rally 1977 5.0L / 305 / V8
Chevrolet Nova Rally 1978 5.0L / 305 / V8
Chevrolet Nova Rally 1979 5.0L / 305 / V8
Chevrolet Nova SS 1976 5.0L / 305 / V8

Specifications:

Barrels 4
Booster Triple Stack
Booster Type Triple Stack
Carburetor Use Street
CFM 625
Choke Electric
Condition NEW
Emission Code 3
Finish Shiny
Fuel Gasoline
Fuel Inlet Single
Marine Use No
Material Aluminum / Composite
Metering Rod Size 60/52
Model Street Demon
Part Type Carburetor
Primary Main Jet 80
Primary Pump Nozzle Size 31
Product Type Carburetor
Proposition 65 www.P65Warnings.ca.gov
Secondaries Vacuum
Secondary Main Jet 80
Step Up Spring Green, Green
Supercharged Application No
Vacuum Ports 1 timed (spark) port, 2 full, and 1 PCV port
Warranty Limited 90 Day

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