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HOLLEY 4150 ALUM ULTRA XP 750 CFM (RED)

HOLLEY 4150 ALUM ULTRA XP 750 CFM (RED)

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

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

Description

Part Number: 0-80803RDX

Holley Ultra XP 750 CFM 4-Barrel Race Carburetor

The ultimate lightweight 4150 aluminum race carburetor featuring red anodized billet metering blocks, high-capacity fuel bowls, and advanced idle bypass technology.

Key Features & Performance Advantages

  • ☑ Lightweight Aluminum Construction: Saves 4.5 lbs (38% weight savings) over conventional zinc race carburetors.
  • ☑ Red Anodized Billet Components: Precision CNC-machined billet aluminum metering blocks and baseplate finished in vibrant red anodizing.
  • ☑ 20% Greater Fuel Capacity: High-capacity fuel bowls feature internal baffling and a fuel shelf to prevent starvation under extreme cornering and acceleration.
  • ☑ Integrated Idle Bypass Valve: Allows precise idle speed adjustments without disturbing the throttle plate-to-transfer slot relationship.
  • ☑ Dual Sight Windows & Bowl Drain Plugs: Clear sight glass on both sides of each bowl and central drain ports simplify trackside tuning and float adjustments.
  • ☑ Flexible Fuel Plumbing: High-flow -8AN O-ring inlet ports come standard with -8AN O-ring to -6AN male adapter fittings.

Technical Specifications

Brand Holley
Manufacturer Part Number 0-80803RDX
CFM Rating 750 CFM
Flange Type 4150 Square Bore
Number of Barrels 4
Material & Finish Tumble-Polished Shiny Aluminum Body with Red Billet Accents
Secondary Type Mechanical (Adjustable 1:1 or Progressive Linkage)
Choke Design None (Chokeless Race Contour Venturi)
Fuel Type Gasoline
Fuel Inlet Thread -8AN O-Ring (-8AN to -6AN Adapters Included)
Idle Control 4-Corner Idle with Integrated Idle Bypass Valve

What’s Included in the Box

  • 1x Holley Ultra XP 750 CFM 4150 Race Carburetor (0-80803RDX)
  • 2x -8AN O-Ring to -6AN Male Adapter Fittings
  • 1x -8AN Fuel Bowl Port Plug
  • 1x Baseplate Mounting Gasket & Hardware Pack

Engineered for drag racing, circuit competition, and high-horsepower engine builds, the Holley Ultra XP series represents the peak of square-bore carburetor performance. Order your Holley 0-80803RDX unit directly from JP Racing for guaranteed authentic hardware, expert UK technical guidance, and fast nationwide delivery.

Frequently Asked Questions

The integrated idle bypass valve allows supplementary air to bypass the throttle plates directly into the plenum. On high-camshaft race engines, this feature allows you to achieve proper idle speed without opening the primary throttle blades too far, preserving the critical throttle plate-to-transfer slot relationship and eliminating off-idle hesitation.

The fuel bowls feature female -8AN O-ringed inlet ports. Holley includes -8AN O-ring to -6AN male adapters in the kit, allowing you to easily connect standard -6AN dual-feed braided fuel lines. Alternatively, you can plumb custom -8AN fuel lines directly using appropriate -8AN O-ring fittings.

No, the Holley Ultra XP 0-80803RDX is a high-performance race carburetor designed without a choke mechanism or engine vacuum ports. It is intended exclusively for off-road motorsport, circuit, and drag racing competition applications.

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