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HOLLEY 750CFM ULTRA XP carburettor

Original price was: £1,885.64.Current price is: £1,791.36. Inc. VAT

SKU: HOL0-80803BKX Categories: , , Brand:

Description

Part Number: 0-80803BKX

Holley 750 CFM Ultra XP 4-Barrel Race Carburetor

The ultimate square-bore motorsport carburetor, engineered with lightweight aluminum construction, black anodized billet metering blocks, and mechanical secondaries for maximum competition performance.

Key Features & Performance Advantages

  • Lightweight All-Aluminum Construction: Delivers up to 38% weight savings (4.5 lbs lighter) compared to traditional zinc carburetors.
  • High-Capacity Fuel Bowls: Features 20% greater fuel capacity with internal baffling and fuel shelf to eliminate aeration and fuel slosh.
  • Integrated Idle Bypass Valve: Allows precise idle speed adjustments on radical engines without changing throttle plate to transfer slot position.
  • Billet Aluminum Metering Blocks & Base Plate: Black anodized billet components feature fully adjustable emulsion bleeds, power valve channel restrictors, and idle feed restrictors.
  • Clear Fuel Sight Windows: Dual-sided sight windows allow safe, instantaneous fuel level checks and adjustments.
  • Dual Plumbing Flexibility: -8AN O-ring inlet threads with included -8AN to -6AN male adapters enable flexible fuel line routing from either side.

Technical Specifications


Brand Holley
Manufacturer Part Number 0-80803BKX
CFM Rating 750 CFM
Carburetor Flange Model 4150 (Dual mounting pattern for 4150 / 4500 manifolds)
Secondary Type Mechanical Secondary
Fuel Type Gasoline
Finish Tumble Polished Main Body / Black Anodized Billet Blocks & Base Plate
Discharge Nozzle Size 0.031″ (Primary & Secondary)
Fuel Inlet Threads -8AN O-Ring (includes -8AN to -6AN male adapters)

What’s Included in the Box

  • 1x Holley 750 CFM Ultra XP Race Carburetor (PN 0-80803BKX)
  • 2x -8AN O-Ring to -6AN Male Fuel Bowl Adapters
  • 1x -8AN Fuel Bowl Plug
  • Base Flange Gasket and Mounting Hardware Kit

Engineered for drag racing, circle track, and high-horsepower competition, Holley’s Ultra XP series represents the benchmark in square-bore carburetor design. When you order your Holley performance components from JP Racing, you benefit from expert UK technical assistance and rapid domestic despatch.

Frequently Asked Questions

No, the Holley Ultra XP series carburetors are designed strictly for motorsport and race applications. They do not feature transmission kickdown linkages, vacuum ports, or chokes required for standard street applications.

The integrated Idle Bypass Valve lets air pass through the carburetor main body to adjust idle speed on engines with aggressive camshafts without drilling holes in throttle blades or exposing the transfer slots prematurely.

The fuel bowls feature female -8AN O-ring ports. Holley supplies -8AN O-ring to -6AN male adapters and a -8AN plug in the retail box, giving you flexibility to plumb dual-feed fuel setups using standard -6AN or -8AN lines.

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