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Holley Performance 0-80842HBX Ultra XP Carburetor


4 bbl - 650 cfm - No Chock - Model 4150UXP - Mech. Secondary - E-85 - Dual Fuel Inlet - 1.688 in. Throttle Bore - 1.250 in. Venturii Size - Hard Core Black

Holley Performance Ultra XP Carburetor 0-80842HBX

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Holley Performance - Ultra XP Carburetor - Part#: 0-80842HBX Features:

  • Aluminum Construction
  • Saves 4.5 Pounds 38 Percent Weight Savings
  • Gray w/Blk Anodized Billet Alum Meter Block Booster Inserts
  • E85 Specific Calibration
  • Contoured Venturri Inlet Balances Airflow For Increased hp
  • Air Bleeds Moved Outward Allow A Smoother Transition urii
  • Metering Blocks Feature ImprovedTrue Gasket Sealing
  • Idle Bypass Valve Eliminates Holes In Throttle Plates
  • 30CC/50CC Accelerator Pumps Fuel From Idle To Full Throttle

View the Full List of Automotive Applications »

Below is an abbreviated list of applications for the Ultra XP Carburetor.


Holley products have been the undisputed leader in fuel systems for over 100 years. Holley carburetors power every NASCAR Sprint Cup team and every NHRA Pro–Stock champion. Holley's products include performance fuel pumps, fuel injection, intake manifolds, cylinder heads & engine dress–up products for street performance, race and marine applications. As a single solution, or partnered with products from other Holley companies, Hooker Headers, Flowtech Headers, NOS, Weiand, or Earl's, Holley products can give you the edge you need over the competition.

Shipping Information

  • Item Requires Shipping
  • 9.2 lbs.
  • W12.3800” x H9.1300” x L14.2500”