Experience the pinnacle of performance with Holley Ultra XP™ carburetors! These extraordinary carbs redefine racing standards, boasting a remarkable 38% weight reduction compared to traditional race carbs, a 20% increase in fuel capacity, and an array of 30 innovative features. Choose from the all-new Hard Core Gray™ hard coat anodized finish with Black™ billet for enhanced corrosion protection or opt for the natural tumble-polished aluminum version with your preferred Black™ or Red™ metering blocks and base plate. The Aluminum Ultra XP series is available in 600, 650, 750, 850, and True 950-CFM, making them the ultimate square bore race carburetors.
Key Features:
- Aluminum Construction (4.5 lbs lighter - 38% weight savings)
- Hard Core Gray with black anodized billet aluminum metering block and booster inserts
- Designed for Drag race, circle track, or any high horsepower engines
- Contoured venturri inlet for balanced airflow and increased horsepower
- Outward-moved air bleeds for a smoother airflow transition from the top to the venturii
- Metering blocks with improved durability, true gasket sealing, and full adjustability (emulsion bleeds, power valve channel restrictors & idle feed restrictors)
- Integrated idle bypass valve eliminates the need for holes in throttle plates and allows for proper adjustment of idle while maintaining correct throttle plate to transfer slot relationship. Ideal for radical camshafts.
- Dual 30cc accelerator pumps for optimal fuel delivery from idle to full throttle
- Fuel bowls with 20% more capacity and internal baffling for controlled slosh
- Clear sight windows on both sides for easy and safe fuel level adjustments
- Built-in drain plug in front center of bowl for easy access to empty contents
- 8AN (o-ringed) inlet threads for versatile plumbing options, accessible from either side
- 4 corner idle for precise control of the idle system
- Mechanical Secondaries for flawless off-the-line launches
- Elongated (dual pattern) mounting holes for fitment on intakes with square flange (Holley 4150™ style) or large flange (Holley Dominator® style)
- Knurled (hand adjustable) primary and secondary curb idle screws for tool-free idle adjustment
- Primary throttle shaft capped to prevent debris entry
- Factory machined accessory mounting hole for easy addition of adjustable primary throttle stop
- New secondary pump cam lever for positive throttle stop on the secondary side
- Stainless steel adjustable secondary link providing a choice of 1:1 or progressive secondary throttle actuation for ultimate control
- Baseplate designed with a machinable boss for a vacuum source
- Includes notched float and jet extensions
- 100% wet-flow tested by Holley technicians to ensure it arrives ready to run!
- Local Pickup Available:
- No
- Local Delivery Available:
- No
- Additional Handling:
- No
