Xtreme Performance - HolleyUltra XP carburetors! Ultra XPcarbs are 38% lighter than ouroriginal HP, have fuel capacity that is 20% greater and 30 other new features! They’re available in our all-new Hard Core Gray™ hardcoat anodized finish with Black™ billet for improvedcorrosion protection. They’re also available innatural tumble-polished aluminum with your choice of Black™ or Red™ meteringblocks and base plate. The Aluminum Ultra XP comes in 600, 650, 750, 850, and True 950-CFM. Holley Ultra XP carburetors offer new featuressuch 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 capacityto 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, billetbase plate, adjustable secondary linkage and knurled (hand adjustable) curb idle screws. Holley Ultra XP carburetors are the ultimate in square bore race carburetors!

Features:

• Aluminum Construction (saves 4.5 lbs - 38% weight savings)
• Shiny with black anodized billet aluminummetering blocks and base plate
• Designed for useon Drag race, circle track, orany high horsepower engines
• Contoured venturri inlet offers balancedairflow for increased horsepower
• Air bleeds moved outward to allow a smoother transition of airflowfrom the top of the carburetorinto the venturii
• Metering blocks feature improved durability, true gasket sealing and fully adjustable (emulsion bleeds, power valve channel restrictors & idlefeed restrictors)
• Integrated idle bypass valve eliminatesthe need for holes in throttleplates 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 capacitywhile controlling slosh with internal baffling
• Clear sight windows on both sides of bowlsfor 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 eitherside
• 4 corner idle allows you to precisely control your idle system
• Mechanical Secondaries for perfect off the line launches
• Elongated (dual pattern) mounting holes allow fitment on intakes with square flange (Holley 4150â„¢style) or large flange (HolleyDominator® style)
• Knurled (hand adjustable) primary and secondary curb idle screws allow for easy idle adjustmentwithout the use of tools
• Primary throttleshaft capped to prevent entry of debris & contaminates
• Factory machined accessory mounting hole for easy addition of adjustable primary throttle stop. New secondary pump cam lever designed to provide positive throttle stop on secondary side
• Stainless steel adjustable secondary link. Provides choice of 1:1 or progressivesecondary throttle actuation for ultimate controlof secondary opening rate
• Baseplate designed with a boss that can be consumer machined for vacuum source
• Includesnotched float and jet extensions
• 100% wet-flow tested by Holley technicians to assure it arrives ready to run!