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#425080845HBX
$1,348.95
/each
Factory Shipped
$1,499.95
Save $151.00
Quantity
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4-Barrel Carburetor Barrels, E85 Fuel Type, 950 CFM CFM
Rebates Available
See rebate details| Carburetor Barrels | 4-Barrel |
| Fuel Type | E85 |
| Choke Type | No Choke |
| CFM Range | 900-999 CFM |
| CFM | 950 CFM |
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855.313.9176Quick and Easy Returns
Return PolicyThe Holley Ultra XP Carburetor (0-80845HBX) is a 950 CFM 4-barrel mechanical-secondary race carburetor with an E85-specific calibration, finished in Hard Core Gray hard-coat anodize with Black billet metering blocks and base plate. Up to 38% lighter than traditional race carburetors thanks to all-aluminum construction. Features elongated dual-pattern mounting holes that allow installation on either Holley 4150-style square flange or Holley Dominator-style large flange manifolds, making this a versatile choice for drag race, circle track, or any high-horsepower application.
Features:
950 CFM, 4150-style 4-barrel with mechanical secondaries
E85-specific calibration
All-aluminum construction (saves 4.5 lbs - 38% weight savings)
Hard Core Gray with black anodized billet aluminum metering blocks and booster inserts
Designed for drag race, circle track, or any high-horsepower engines
Contoured venturii inlet for balanced airflow and increased horsepower
Air bleeds moved outward for a smoother transition of airflow into the venturii
Fully adjustable metering blocks with true gasket sealing (emulsion bleeds, power valve channel restrictors, idle feed restrictors)
Integrated idle bypass valve maintains correct throttle plate to transfer slot relationship - good for radical camshafts
Fuel bowls provide 20% more fuel capacity with internal baffling to control slosh
Clear sight windows on both sides of the bowls
Built-in drain plug in front center of the bowl
-8AN O-ring inlet threads, can be plumbed from either side
Elongated (dual pattern) mounting holes - fits both Holley 4150 and Dominator flanges
Knurled (hand adjustable) primary and secondary curb idle screws
Capped primary throttle shaft to prevent debris entry
Factory machined accessory mounting hole for an adjustable primary throttle stop
Stainless steel adjustable secondary link - 1:1 or progressive secondary actuation
Specs
Rebates
Holley's October Promo 10% Off Select Parts Sale, running from September 28, 2026, through November 1, 2026. For a limited time, customers can save up to 10% off on select Holley parts, making it the perfect opportunity to upgrade your ride with premium Holley branded parts including Holley, Brawler, Quick Fuel, Leg Wheels, Rev Wheels, Rocket Racing, Flowtech, Edge, Racequip, Apr and Dinan. Purchases must be made between September 28, 2026, through November 1, 2026. This limited-time offer applies to qualifying Holley branded parts purchased during the promotional period. Following the promotion, these parts will revert back to standard pricing.
Guides & Documents
For use on pre-1966 vehicles only
WARNING:
Cancer and Reproductive Harm – www.P65Warnings.ca.gov
| KEY SPECS | |
|---|---|
| MFG. Part # | 0-80845HBX |
| Brand | Holley |
| Carburetor Barrels | 4-Barrel |
| Fuel Type | E85 |
| Choke Type | No Choke |
| CFM Range | 900-999 CFM |
| CFM | 950 CFM |
| Carburetor Flange Type | 4-Barrel Square Bore |
| Finish | Anodized |
| Material Type | Aluminum |
| Color | Black |
| Secondary Type | Mechanical |
| Fuel Inlet Type | Dual |
| Gasket(s) Included | No |
| New or Remanufactured | New |
| Throttle Linkage Type | Progressive |
| Supercharged Application | No |
| GENERAL | |
| GTIN Code | 090127713563 |
| Sold in Quantity | Each |
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