Holley's Ultra XP carburetor is up to 38% lighter than traditional race carbs, with 20% more fuel capacity and a Hard Core Gray hard-coat anodized finish with black billet for improved corrosion protection.
Specifications:
- Brand: Holley
- CFM: 950
- Model: 4150
- Barrels: 4
- Secondaries: Mechanical
- Booster Design: Downleg
- Flange: Square/4150 (dual-pattern, also fits Dominator-style flange)
- Fuel: Gasoline
- Body Finish: E-Coated, Hard Core Gray with Black
- Carburetor Material: Aluminum
- Fuel Inlet: Dual, 8AN O-ringed
- Throttle Bore: 1.750 in.
- Venturii Size: 1.600 in.
- Primary/Secondary Main Jet: 92
- Primary/Secondary Power Valve: 4.5
- Primary/Secondary Pump Nozzle Size: 32
- Carburetor Use: Professional Race
- Condition: New
- UPC: 90127713501
- Warranty: Manufacturer's Limited 90 Day Warranty
- Part Number: 0-80805HBX
Dual-pattern mounting holes allow installation on manifolds machined for either 4150-style square flange or Dominator-style large flange. Includes notched float and jet extensions, a fully adjustable stainless steel secondary linkage, and mechanical secondaries for consistent off-the-line launches.
FAQ
What is the CFM rating?
950 CFM.
What secondaries does it use?
Mechanical secondaries.
Will it fit a Dominator-style intake?
Yes, the dual-pattern mounting holes fit both 4150-style square flange and Dominator-style large flange intakes.
What finish is this carburetor?
Hard Core Gray hard-coat anodized finish with black anodized billet metering block and booster inserts.
What size fuel inlet fittings does it use?
8AN O-ringed inlet threads, plumbable from either side.

