SKU: 75071621995

Holley 750cfm Ultra XP Aluminium Carburettor (HO0-80803RDX)

Sale price$1137.60 Regular price$1264.00
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Description

Holley 750cfm Ultra XP Aluminium Carburettor (HO0-80803RDX)HO0 80803RDX 750CFM NEW ALLOY ULTRA XP Shiny Aluminium with Red Billet Metering Blocks & Base Plates Part Number: HO0 80803RDX Xtreme Performance Holley Ultra XP carburetors! Ultra XP carbs are 38% lighter than our original HP, have fuel capacity that is 20% greater and 30 other new features! Theyre available in our all new Hard Core Gray hard coat anodized finish with Black billet for improved corrosion protection. Theyre also available in natural

HO0-80803RDX - 750CFM NEW ALLOY ULTRA XP

Shiny Aluminium with Red Billet Metering Blocks & Base Plates

Part Number: HO0-80803RDX

Xtreme Performance - Holley Ultra XP carburetors! Ultra XP carbs are 38% lighter than our original HP, have fuel capacity that is 20% greater and 30 other new features! They’re available in our all-new Hard Core Gray™ hard coat anodized finish with Black™ billet for improved corrosion protection. They’re also available in natural tumble-polished aluminum with your choice of Black™ or Red™ metering blocks and base plate. The Aluminum Ultra XP comes in 600, 650, 750, 850, and True 950-CFM. 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!
Features:
Aluminum Construction (saves 4.5 lbs - 38% weight savings)
Shiny with black 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)
Integrate d 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
Mechanical Secondaries for perfect off the line launches
Elongated (dual pattern) mounting holes allow fitment on intakes with square flange (Holley 4150™ style) or large flange (Holley Dominator® style)
Knurled (hand adjustable) primary and secondary curb idle screws allow for easy idle adjustment without the use of tools
Primary throttle shaft 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 control of secondary opening rate
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!

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
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  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
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SKU: 75071621995

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4.3 ★★★★★
Based on 17 reviews
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Product Reviews
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Verified Purchase
Patti VanGorden
New York, US
★★★★★ 5
Pleasantly surprised at the size of this machine
Style: WF-7840, Set: DUAL TRAY (500 sheets)/FAX/ADF/PRINT/COPY/SCAN
This is an amazing printer!! I was surprised at how large it is because I assumed it was a smaller sized unit. I guess I didn’t check the dimensions before I bought it. That’s okay, though, I made room for it. Very easy to set up and connect to the internet. Print quality is awesome and the print/copy speed is great! Very happy with my purchase.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 25, 2026
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Verified Purchase
Gary
Battle Creek, US
★★★★★ 4
Clean prints
Style: WF-7840, Set: DUAL TRAY (500 sheets)/FAX/ADF/PRINT/COPY/SCAN
Works well but a little slow. This could be only my internet connection speed through my router. I thought the 11x17 paper would fit fully inside one of the trays. It does not and hangs out as shown in the instruction manual which came with the unit. The initial ink cartridges are working well beyond their expected time.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 28, 2026
W
Verified Purchase
William E Coleman
Battle Creek, US
★★★★★ 5
wi-fi connectivity appears to be fixed! Yay!
Style: WF-7840, Set: DUAL TRAY (500 sheets)/FAX/ADF/PRINT/COPY/SCAN
Updated: Connectivity has only failed once out of may prints! Yay! 5 stars if this keeps up! LEAVE THE FIRMWARE ALONE NOW! Updated again: This latest firmware update is an improvement. Up to 4 stars now: The printer has worked 2 times out of the last 3 prints. That is better than never working. Killing the Epson task and unplugging/plugging the printer is still the fasted way to fix when connectivity fails. Updated again: Every frequent firmware update makes the connectivity WORSE. Now the printer FAILS TO CONNECT EVERY TIME I PRINT. Right now the printer is installing yet another update. The notification says the firmware update is under SETTINGS. Yes, true, but 4 layers down so I end up searching and scrolling back an forth with every update. Why is it that the most used features are buried in the menus. Coder's revenge, I guess. The connection fails, the connection fixer thing asks a bunch of stupid questions and won't go away. Is the printer on? Did you change your router? Then is fails and suggests trying more stupid stuff. It should say: Use Task Manager to kill the running Epson task. Unplug the printer, then plug it back in. In 5 minutes, you will have your print. How convenient. EVERY TIME I PRINT. I expect this or the next FW update will kill even that. This is a beautiful mechanical machine with idiotic electronics and firmware/software. Updated review: This printer forgets who and where it is about once a week. The printer is only 6 feet from the Wi-Fi router. I have to run the Connection Checker program, answer irrelevant questions, reset the router, blah, blah, blah - the robot version of a customer support call. Make sure you also have an HP or Brother printer in case you need something printed right away when it hangs up. You will end up with an extra copy once the Epson wakes up. This is getting old. My HP printer never does this. My two Brother printers never do this. Epson finally came out with a mechanical masterpiece that always feeds and never jams. Now Epson needs to work on their interface design. I never thought Epson Connection Checker would be on my most-used software list. ---------- Original review: I really like this printer. I am not a photographer and I don't print t-shirts. The WF-7840 prints fast and feeds paper without jamming. That is more than I can say about the Artisan 1430 as a general purpose printer. This is a big printer, but if you have room for it, it is a very nice machine. It does so much that you will need the help file to do much of anything, but it will be there somewhere. I printed all of June, July, and August and part of September on the starter ink cartridges. I only use it for color prints. I have 3 laser printers for B&W prints. The WF-7840 only has ink 4 cartridges instead of 6 like the 1430. I am very happy with my purchase.
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Reviewed in the United States on September 12, 2021
J
Verified Purchase
Jason K
Alexandria, US
★★★★★ 5
Jobsite Workhorse
Style: WF-7840, Set: DUAL TRAY (500 sheets)/FAX/ADF/PRINT/COPY/SCAN
Have had previous models of this printer and they have always been solid. We use them in our office trailers on our construction jobsites and this new version works excellent just as the previous series did.
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Reviewed in the United States on May 26, 2026
A
Verified Purchase
Andrew Lierl
Belleville, US
★★★★★ 5
Excellent, as long as you don't update firmware
Style: WF-7840, Set: DUAL TRAY (500 sheets)/FAX/ADF/PRINT/COPY/SCAN
About 6 months in, and I am very happy with the performance of this printer. I loved that it collated multipage documents without being told to! I have denied every request for firmware updates, and I am pleased to report that remanufactured ink cartridges (pronounced "more affordable and just as good") work just fine. DO NOT UPDATE THE FIRMWARE. The updates only serve to make it impossible to use off-brand or remanufactured ink cartridges.
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Reviewed in the United States on April 21, 2026

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