{"product_id":"4150-alum-ultra-xp-650-cf","title":"4150 ALUM ULTRA XP 650 CF","description":"\u003cp\u003e\u003cb\u003ePart #:\u003c\/b\u003e 0-80812HBX\u003c\/p\u003e\u003cp\u003eXtreme Performance - Holley Ultra XP (TM) Circle Track Carburetors! Ultra XP carbs are up to 38% lighter than our traditional race carbs, have fuel capacity that is 20% greater and 30 other new features! They're available in our Hard Core Gray (TM) hard coat anodized finish with Black (TM) billet for improved corrosion protection \u0026amp; also available in natural tumble-polished aluminum with Black (TM) metering blocks and base plate. The Aluminum Ultra XP Circle Track carbs are available in 650 \u0026amp; 750 CFM's. Holley Ultra XP carburetors are Specifically Calibrated for Circle Track \u0026amp; offer new features such as anti-siphon valve in the main body; 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, wedge floats, adjustable secondary linkage and knurled (hand adjustable) curb idle screws. Holley Ultra XP carburetors are the ultimate in square bore race carburetors!\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eAluminum Construction (saves 4.5 lbs - 38% weight savings)\u003c\/li\u003e\n\u003cli\u003eHard Core Gray with black anodized billet aluminum metering block and booster inserts\u003c\/li\u003e\n\u003cli\u003eCalibrated specifically for use on circle track\u003c\/li\u003e\n\u003cli\u003eHas a set screw in the base plate for wide open throttle stop adjustment\u003c\/li\u003e\n\u003cli\u003ePTFE coated throttle shafts rides in oil impregnanted bronze bushings for smooth throttle actuation\u003c\/li\u003e\n\u003cli\u003eAnti-siphon valve in main body to reduce pump pullover\u003c\/li\u003e\n\u003cli\u003eContoured venturri inlet offers balanced airflow for increased horsepower\u003c\/li\u003e\n\u003cli\u003eAir bleeds moved outward to allow a smoother transition of airflow from the top of the carburetor into the venturii\u003c\/li\u003e\n\u003cli\u003eMetering blocks feature improved durability, true gasket sealing and fully adjustable (emulsion bleeds, power valve channel restrictors \u0026amp; idle feed restrictors)\u003c\/li\u003e\n\u003cli\u003eIntegrated 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.\u003c\/li\u003e\n\u003cli\u003eDual 30cc accelerator pumps provide the perfect amount of fuel from idle to full throttle\u003c\/li\u003e\n\u003cli\u003eFuel bowls provide 20% more fuel capacity while controlling slosh with internal baffling\u003c\/li\u003e\n\u003cli\u003eClear sight windows on both sides of bowls for easy and safe fuel level adjustments\u003c\/li\u003e\n\u003cli\u003eBuilt in drain plug in front center of bowl provides easy access to empty contents of bowl\u003c\/li\u003e\n\u003cli\u003e-8 (o-ringed) inlet threads offer a large variety of plumbing options and can be plumbed from either side; comes from the factory with 8AN inlet fittings\u003c\/li\u003e\n\u003cli\u003e4 corner idle allows you to precisely control your idle system\u003c\/li\u003e\n\u003cli\u003eInternal pump passage in metering block equipped with a tunable bleed off for further tuning of accelerator pump\u003c\/li\u003e\n\u003cli\u003eKnurled (hand adjustable) primary and secondary curb idle screws allow for easy idle adjustment without the use of tools\u003c\/li\u003e\n\u003cli\u003ePrimary throttle shaft capped to prevent entry of debris \u0026amp; contaminates\u003c\/li\u003e\n\u003cli\u003eFactory 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\u003c\/li\u003e\n\u003cli\u003eSet up with 1:1 throttle actuation\u003c\/li\u003e\n\u003cli\u003eBaseplate designed with a boss that can be consumer machined for vacuum source\u003c\/li\u003e\n\u003cli\u003eIncludes wedge floats\u003c\/li\u003e\n\u003cli\u003e100% wet-flow tested by Holley technicians to assure it arrives ready to run!\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eMechanical Secondary Calibrated for Circle Track-4150\u003c\/p\u003e","brand":"Holley","offers":[{"title":"Default Title","offer_id":52258406662456,"sku":"H00E 0-80812HBX","price":1273.84,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/horsepower-asset-516968-3344379-square.webp?v=1778110788","url":"https:\/\/store.motormia.co\/products\/4150-alum-ultra-xp-650-cf","provider":"MOTORMIA","version":"1.0","type":"link"}