Overview of a Holley 4150 mechanical secondary carburetor, Double PumperYouTube Button

950 CFM Street HP Carburetor

Mechanical Secondary

PART# 0-82951

Suggested Retail: $646.95
Your Price: $581.95
Free Shipping on orders over $100*


The Street HP™ uses the best features from Holley's race Bred 4150 HP™ carbs, but tamed for street and light competition use. The Street HP features the contoured main body from the 4150 HP™ and has a tumble polished shiny finish and screw in air bleeds for precision tuning capabilities. The metering system includes a timed spark port for a vacuum advance distributor and is calibrated for a hot street/strip engine setup for outstanding throttle response and drivability. A street HP base plate is used so there are plenty of vacuum ports for power brakes, PCV, etc. The Street HP takes all the great features from the race HP and the Double Pumper and combines them into the perfect street/strip carburetor.


  • Vibratory polished for good looks
  • Optimized street/strip calibration for outstanding throttle response and drivability
  • Contoured venturri inlet offers balanced airflow for increased horsepower
  • Screw in air bleeds for precision tuning capabilities
  • Four corner idle for precise idle control
  • Mechanical secondaries for awesome tire turning performance
  • Dual accelerator pumps for additional fuel under initial acceleration
  • Dual feed fuel inlets for constant high volume fuel delivery
  • Compatible with GM, Chrysler, and Ford A/T kickdown linkage. Additional parts may be required.
  • Intended for lightweight vehicles w/ manual trans or automatics with high stall & low gearing
  • 100% wet-flow tested by Holley technicians to assure it arrives ready to run!


BoosterDown Leg
Emission Code3
Fuel InletDual
Product TypeCarburetor
Supercharged ApplicationNo
Throttle Bore1.750 inch
Venturii Size1.563 inch
WarningCalifornia Proposition 65

Tech Resources

Parts & Kits


This part is legal for use on Uncontrolled (Non-Emissions Controlled) Vehicles or Racing Vehicles.

The following vehicles are considered Uncontrolled (Non-Emissions Controlled) Vehicles:

  • 1965 and older U.S. manufactured California Certified vehicles
  • 1967 and older U.S. manufactured Federally Certified vehicles
  • 1967 and older Foreign manufactured vehicle

Racing Vehicles are vehicles that are used exclusively for racing or other forms of competition that are not registered and that may never be used on the street.

WARNING FOR 0-82951: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.
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    *Free Shipping & Handling only offered to the continental US on orders over $100.

    Some parts are not legal for use in California or other states with similar regulations.