Description
Part Number: 0-80805HBX
Holley Ultra XP 950 CFM 4-Barrel Race Carburetor
Engineered for maximum airflow and race-proven consistency, the Holley Ultra XP 950 CFM carburetor provides lightweight aluminum construction, superior fuel control, and precision tuning for high-horsepower drag race and circuit track applications.
Key Product Features
- ☑ Lightweight Aluminum Construction: Delivers up to 38% weight savings (4.5 lbs lighter than traditional zinc cast carburetors).
- ☑ Hard Core Gray & Black Finish: Features a durable Hard Core Gray hard-coat anodized main body with black anodized billet aluminum metering blocks and booster inserts.
- ☑ High-Flow 950 CFM Airflow: Designed with contoured venturi inlets and outward-positioned air bleeds for smooth, balanced airflow and maximized horsepower.
- ☑ Integrated Idle Bypass Valve: Allows exact idle adjustment without drilling throttle plates, maintaining proper throttle plate to transfer slot position for radical camshafts.
- ☑ 4-Corner Idle & Mechanical Secondaries: Provides total tuning flexibility and immediate throttle response for aggressive off-the-line acceleration.
- ☑ High-Capacity Fuel Bowls: Offers 20% greater fuel capacity with internal baffling, clear sight glass windows on both sides, and -8AN O-ringed inlet ports.
Technical Specifications
| Brand | Holley |
|---|---|
| Manufacturer Part Number | 0-80805HBX |
| Carburetor Model | 4150 Ultra XP |
| CFM Rating | 950 CFM |
| Number of Barrels | 4-Barrel |
| Flange Style | Square Bore (Dual Pattern 4150 / 4500) |
| Main Material | Aluminum |
| Finish | Hard Core Gray with Black Anodized Billet Metering Blocks |
| Secondary Type | Mechanical Secondary |
| Choke Type | None (Race Spec) |
| Fuel Inlet Threads | -8AN O-Ring Boss (Includes -8AN to -6AN Adapter Fittings) |
| Accelerator Pump | Dual 30cc Pumps |
What’s Included in the Box
- 1x Holley Ultra XP 950 CFM 4-Barrel Carburetor (PN 0-80805HBX)
- 2x -8AN O-Ring to -6AN Male Fuel Inlet Adapters
- 1x -8AN O-Ring Port Plug
- 1x Base Flange Mounting Gasket & Hardware Kit
Engineered for the rigorous demands of competition motorsport, Holley Ultra XP carburetors represent the peak of mechanical fuel delivery performance. Order with total confidence from JP Racing for fast UK delivery and direct technical support from our experienced team.




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