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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
$712.99 ea

NEWARRIVING SOONEstimated Ship Date 06/02/2025 (If Ordered Today)100 Available from HOLLEY PERFORMANCE PRODUCTS as of 05/12/2025
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 Camaro Base 1967 6.5L / 396 / V8
5.3L / 327 / V8
Chevrolet Camaro Base 1968 5.3L / 327 / V8
Chevrolet Camaro Base 1969 5.0L / 307 / V8
5.3L / 327 / V8
7.0L / 427 / V8
5.7L / 350 / V8
Chevrolet Camaro Base 1970 5.0L / 307 / V8
5.7L / 350 / V8
Chevrolet Camaro Base 1971 5.0L / 307 / V8
6.6L / 402 / V8
5.7L / 350 / V8
Chevrolet Camaro Base 1972 5.0L / 307 / V8
6.6L / 402 / V8
5.7L / 350 / V8
Chevrolet Camaro Base 1973 5.0L / 307 / V8
5.7L / 350 / V8
Chevrolet Camaro Base 1974 5.7L / 350 / V8
Chevrolet Camaro Base 1976 5.0L / 305 / V8
Chevrolet Camaro Base 1977 5.0L / 305 / V8
Chevrolet Camaro Base 1978 5.0L / 305 / V8
Chevrolet Camaro Base 1979 5.0L / 305 / V8
Chevrolet Camaro Berlinetta 1979 5.0L / 305 / V8
Chevrolet Camaro LT Rally Sport 1976 5.0L / 305 / V8
Chevrolet Camaro LT Rally Sport 1977 5.0L / 305 / V8
Chevrolet Camaro LT Rally Sport 1978 5.0L / 305 / V8
Chevrolet Camaro LT 1973 5.0L / 307 / V8
5.7L / 350 / V8
Chevrolet Camaro LT 1974 5.7L / 350 / V8
Chevrolet Camaro LT 1976 5.0L / 305 / V8
Chevrolet Camaro LT 1977 5.0L / 305 / V8
Chevrolet Camaro LT 1978 5.0L / 305 / V8
Chevrolet Camaro RS 1967 6.5L / 396 / V8
5.7L / 350 / V8
5.3L / 327 / V8
Chevrolet Camaro RS 1968 5.3L / 327 / V8
Chevrolet Camaro RS 1969 7.0L / 427 / V8
5.0L / 307 / V8
5.7L / 350 / V8
5.3L / 327 / V8
Chevrolet Camaro RS 1970 5.0L / 307 / V8
5.7L / 350 / V8
Chevrolet Camaro RS 1971 5.0L / 307 / V8
5.7L / 350 / V8
Chevrolet Camaro RS 1972 5.0L / 307 / V8
5.7L / 350 / V8
Chevrolet Camaro RS 1973 5.0L / 307 / V8
5.7L / 350 / V8
Chevrolet Camaro Rally Sport 1976 5.0L / 305 / V8
Chevrolet Camaro Rally Sport 1977 5.0L / 305 / V8
Chevrolet Camaro Rally Sport 1978 5.0L / 305 / V8
Chevrolet Camaro Rally Sport 1979 5.0L / 305 / V8
Chevrolet Camaro SS 1967 6.5L / 396 / V8
5.7L / 350 / V8
Chevrolet Camaro SS 1968 6.5L / 396 / V8
5.7L / 350 / V8
Chevrolet Camaro SS 1969 6.5L / 396 / V8
5.7L / 350 / V8
Chevrolet Camaro SS 1970 6.6L / 402 / V8
5.7L / 350 / V8
Chevrolet Camaro SS 1971 6.6L / 402 / V8
5.7L / 350 / V8
Chevrolet Camaro SS 1972 6.6L / 402 / V8
5.7L / 350 / V8
Chevrolet Camaro Z28 1967 4.9L / 302 / V8
Chevrolet Camaro Z28 1968 4.9L / 302 / V8
Chevrolet Camaro Z28 1969 4.9L / 302 / V8
Chevrolet Camaro Z28 1970 5.7L / 350 / V8
Chevrolet Camaro Z28 1971 5.7L / 350 / V8
Chevrolet Camaro Z28 1972 5.7L / 350 / V8
6.6L / 402 / V8
Chevrolet Camaro Z28 1973 5.7L / 350 / V8
Chevrolet Camaro Z28 1974 5.7L / 350 / V8
Chevrolet Camaro Z28 1979 5.0L / 305 / V8
Pontiac Firebird 350 HO 1969 5.7L / 350 / V8
Pontiac Firebird 350 1968 5.7L / 350 / V8
Pontiac Firebird 350 1969 5.7L / 350 / V8
Pontiac Firebird 400 1967 6.6L / 400 / V8
Pontiac Firebird 400 1968 6.6L / 400 / V8
Pontiac Firebird 400 1969 6.6L / 400 / V8
Pontiac Firebird Base 1967 6.6L / 400 / V8
Pontiac Firebird Base 1968 5.7L / 350 / V8
6.6L / 400 / V8
Pontiac Firebird Base 1969 5.7L / 350 / V8
6.6L / 400 / V8
Pontiac Firebird Base 1970 5.7L / 350 / V8
6.6L / 400 / V8
Pontiac Firebird Base 1971 5.7L / 350 / V8
6.6L / 400 / V8
7.5L / 455 / V8
Pontiac Firebird Base 1972 5.7L / 350 / V8
6.6L / 400 / V8
7.5L / 455 / V8
Pontiac Firebird Base 1973 5.7L / 350 / V8
6.6L / 400 / V8
7.5L / 455 / V8
Pontiac Firebird Base 1974 5.7L / 350 / V8
6.6L / 400 / V8
7.5L / 455 / V8
Pontiac Firebird Base 1975 6.6L / 400 / V8
Pontiac Firebird Base 1976 6.6L / 400 / V8
Pontiac Firebird Base 1977 4.9L / 301 / V8
6.6L / 403 / V8
6.6L / 400 / V8
5.0L / 305 / V8
Pontiac Firebird Base 1978 5.0L / 305 / V8
Pontiac Firebird Base 1979 4.9L / 301 / V8
5.0L / 305 / V8
Pontiac Firebird Esprit 1970 6.6L / 400 / V8
5.7L / 350 / V8
Pontiac Firebird Esprit 1971 6.6L / 400 / V8
7.5L / 455 / V8
5.7L / 350 / V8
Pontiac Firebird Esprit 1972 6.6L / 400 / V8
7.5L / 455 / V8
5.7L / 350 / V8
Pontiac Firebird Esprit 1973 6.6L / 400 / V8
7.5L / 455 / V8
5.7L / 350 / V8
Pontiac Firebird Esprit 1974 6.6L / 400 / V8
7.5L / 455 / V8
5.7L / 350 / V8
Pontiac Firebird Esprit 1976 6.6L / 400 / V8
Pontiac Firebird Esprit 1977 5.0L / 305 / V8
4.9L / 301 / V8
Pontiac Firebird Esprit 1978 5.0L / 305 / V8
Pontiac Firebird Esprit 1979 5.0L / 305 / V8
4.9L / 301 / V8
Pontiac Firebird Formula 1970 6.6L / 400 / V8
5.7L / 350 / V8
Pontiac Firebird Formula 1971 7.5L / 455 / V8
6.6L / 400 / V8
5.7L / 350 / V8
Pontiac Firebird Formula 1972 7.5L / 455 / V8
6.6L / 400 / V8
5.7L / 350 / V8
Pontiac Firebird Formula 1973 7.5L / 455 / V8
6.6L / 400 / V8
5.7L / 350 / V8
Pontiac Firebird Formula 1974 7.5L / 455 / V8
6.6L / 400 / V8
5.7L / 350 / V8
Pontiac Firebird Formula 1975 6.6L / 400 / V8
Pontiac Firebird Formula 1976 6.6L / 400 / V8
Pontiac Firebird Formula 1977 6.6L / 403 / V8
4.9L / 301 / V8
6.6L / 400 / V8
5.0L / 305 / V8
Pontiac Firebird Formula 1978 6.6L / 403 / V8
6.6L / 400 / V8
5.0L / 305 / V8
Pontiac Firebird Formula 1979 6.6L / 403 / V8
4.9L / 301 / V8
6.6L / 400 / V8
5.0L / 305 / V8
Pontiac Firebird HO 1967 6.6L / 400 / V8
Pontiac Firebird Trans Am 1969 6.6L / 400 / V8
Pontiac Firebird Trans Am 1970 6.6L / 400 / V8
5.7L / 350 / V8
Pontiac Firebird Trans Am 1971 7.5L / 455 / V8
6.6L / 400 / V8
5.7L / 350 / V8
Pontiac Firebird Trans Am 1972 7.5L / 455 / V8
6.6L / 400 / V8
5.7L / 350 / V8
Pontiac Firebird Trans Am 1973 7.5L / 455 / V8
6.6L / 400 / V8
5.7L / 350 / V8
Pontiac Firebird Trans Am 1974 7.5L / 455 / V8
6.6L / 400 / V8
5.7L / 350 / V8
Pontiac Firebird Trans Am 1975 7.5L / 455 / V8
6.6L / 400 / V8
Pontiac Firebird Trans Am 1976 7.5L / 455 / V8
6.6L / 400 / V8
Pontiac Firebird Trans Am 1977 6.6L / 400 / V8
6.6L / 403 / V8
Pontiac Firebird Trans Am 1978 6.6L / 400 / V8
6.6L / 403 / V8
Pontiac Firebird Trans Am 1979 4.9L / 301 / V8
6.6L / 400 / V8
6.6L / 403 / 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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