Description
Part Number: 0-80812BKX
Holley Aluminum Ultra XP 650 CFM Circle Track Carburetor
Engineered specifically for demanding circle track competition, the Holley 4150 Ultra XP 650 CFM carburetor delivers lightweight performance, race-calibrated fuel metering, and exceptional fuel slosh control under extreme cornering forces.
Key Features & Highlights
- ☑ Lightweight Aluminum Construction: Saves 4.5 lbs (38% weight reduction) compared to traditional zinc race carburetors.
- ☑ Circle Track Specific Calibration: Features an anti-siphon valve in the main body to reduce pump pullover during aggressive maneuvers.
- ☑ High-Capacity Fuel Bowls: 20% greater fuel capacity with internal slosh baffling, integrated fuel shelves, sight windows, and fuel bowl drain plugs.
- ☑ Billet Aluminum Components: Black anodized billet metering blocks and base plate with fully adjustable emulsion bleeds, PVCRs, and idle feed restrictors.
- ☑ Precision Airflow & Idle Control: Integrated idle bypass valve, 4-corner idle adjustment, PTFE-coated throttle shafts, and contoured venturi inlets.
Technical Specifications
| Brand | Holley |
|---|---|
| Part Number | 0-80812BKX |
| Model Series | 4150 Aluminum Ultra XP Circle Track |
| CFM Rating | 650 CFM |
| Number of Barrels | 4-Barrel |
| Flange Style | Square Bore (4150) |
| Choke / Secondary Type | No Choke (Race Only) / Mechanical Secondaries |
| Fuel Type | Gasoline |
| Finish / Color | Shiny Polished Body with Black Billet Metering Blocks & Base Plate |
| Fuel Inlet Size | -8AN O-Ringed (Includes -8AN to -6AN Adapters) |
| Accelerator Pump | Dual 30cc Pumps |
What’s Included in the Box
- (1) Holley Ultra XP 650 CFM Circle Track Carburetor (0-80812BKX)
- (2) Factory-installed -8AN O-ring to -6AN Male Adapter Fittings
- (1) -8AN Port Plug
- Base Flange Gasket & Air Cleaner Gasket
- Carburetor Mounting Hardware Pack
As an official distributor of genuine Holley products, JP Racing delivers world-class motorsport componentry with quick UK dispatch and dedicated technical support for all your race builds.
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