Product Details
Ultra XP Carburetor by Holley®. Xtreme Performance - Holley Ultra XP™ carburetors! Ultra XP carbs are up to 38% lighter than their traditional race carbs, have fuel capacity that is 20% greater and 30 other new features! Holley Ultra XP carburetors offer new features such as an integrated idle bypass valve that allows for idle adjustments while maintaining the correct throttle plate to transfer slot relationship, high capacity fuel bowls which feature 20% more fuel capacity to eliminate starvation, integrated fuel shelf to minimize fuel aeration and internal baffling to control fuel slosh. Other features include all aluminum construction, fully tunable billet metering blocks, billet base plate, adjustable secondary linkage and knurled (hand adjustable) curb idle screws. Holley Ultra XP carburetors are the ultimate in square bore race carburetors!
Specifications
| Choke: None |
| Fuel Inlet: Dual |
| Material: Aluminum |
Features
- Aluminum Construction (saves 4.5 lbs - 38% weight savings)
- Shiny with red anodized billet aluminum metering blocks and base plate
- Designed for use on Drag race, circle track, or any high horsepower engines
- Contoured venturri inlet offers balanced airflow for increased horsepower
- Air bleeds moved outward to allow a smoother transition of airflow from the top of the carburetor into the venturii
- Metering blocks feature improved durability, true gasket sealing and fully adjustable (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. Helps maintain good idle control when using radical camshafts.
- Dual 30cc accelerator pumps provide the perfect amount of fuel from idle to full throttle
- Fuel bowls provide 20% more fuel capacity while controlling slosh with internal baffling
- Clear sight windows on both sides of bowls for easy and safe fuel level adjustments
- Built in drain plug in front center of bowl provides easy access to empty contents of bowl
- 8AN (o-ringed) inlet threads offer a large variety of plumbing options and can be plumbed from either side
- 4 corner idle allows you to precisely control your idle system
- Elongated (dual pattern) mounting holes allow fitment on intakes with square flange (Holley 4150™ style) or large flange (Holley Dominator® style)
- Primary throttle shaft capped to prevent entry of debris & contaminates
- Baseplate designed with a boss that can be consumer machined for vacuum source
- Includes notched float and jet extensions
- 100% wet-flow tested by Holley technicians to assure it arrives ready to run!
Holley® being an undeniable leader in fuel systems for over 100 years, Holley offers a wide range of performance carburetors, fuel pumps, intake manifolds and engine dress–up products for street performance, race, and marine applications. Holley carburetors have powered almost every NHRA Pro–Stock champion and every NASCAR Sprint Cup team for 40 years. As a single solution, or partnered with products from other Holley companies such as Hooker, Flowtech, NOS, Weiand, and others, the Holley products provide the quality and performance you've been looking for.