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Description
750CFM Ultra XP Carburetor - 0-80803BKXOverview: Xtreme Performance Holley Ultra XP 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 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
Overview:
Xtreme Performance - Holley Ultra XP™ 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 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)
- 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
- 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!
Application:
| Year | Make | Model | Submodel | Engine Size |
|---|---|---|---|---|
| Universal |
Specs:
| Barrels | 4 |
|---|---|
| Billet Color | Shiny with Black Billet |
| Booster | Down Leg |
| Brand | Holley |
| Carburetor Use | Professional Race |
| CFM | 750 |
| Choke | None |
| Circuit | 2 |
| Condition | New |
| Emission Code | 3 |
| Finish | Shiny |
| Fuel | Gasoline |
| Fuel Inlet | Dual |
| Marine Use | No |
| Material | Aluminum |
| Model | 4150 |
| Primary Main Jet | 76 |
| Primary Power Valve | 6.5 |
| Primary Pump Nozzle Size | 32 |
| Product Type | Ultra XP Carburetor |
| Secondaries | Mechanical |
| Secondary Main Jet | 76 |
| Secondary Pump Nozzle Size | 32 |
| Supercharged Application | No |
| Throttle Bore | 1.688 inch |
| Venturii Size | 1.376 inch |
| Warning | California Proposition 65 |
| Warranty | Limited 90 Day |
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4.7 ★★★★★
Based on 8 reviews
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Product Reviews
★★★★★ 5
As expected
Format: Paperback
Book arrived in acceptable condition
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 20, 2020
★★★★★ 3
Great book but the pages started falling out
Format: Paperback
This book is very informative and helpful while I navigate nursing school, but after only 6 weeks of use the pages started falling out. I'm careful with the book and I don't even open it everyday but it was poorly made and the pages are not very sturdy.
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Reviewed in the United States on November 28, 2021
★★★★★ 5
A Deep and Rich Resource on Christian Life
Format: Paperback
I've been waiting for this book for quite some time when I heard it would be coming out as part of the Dogmatics series. I really appreciate how he structures the book as God's Trinitarian actions towards us, the law-gospel distinction, and our response to Gods' love. Rich. A real treat to read, ponder, and reflect on.
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Reviewed in the United States on January 20, 2026
★★★★★ 5
One of the Best!
Format: Paperback
Kelly Kapic is one of the best theological writers of our day. He gears his writings a bit toward scholars, but don’t let that stop you. Accept the challenge of this book and you won’t be sorry. The title of the series (“New Studies in Dogmatics”) might scare off some readers, but don’t allow that to camouflage a great read. Yes, scholars will likely eat it up as a book that shows an artisan at work in their trade, but I say pastors and thoughtful Bible students ought to claim this one as their own.
The only part that might appeal more to scholars than the rest of us is how he loves to delve into some historical personage or creed to illustrate his point. That is only an issue because sometimes that takes more explanation than the point at large he is making. I doubt he can help it. He seems like a walking encyclopedia; a passionate one to be sure, but it is amazing the scope at which he views his subject.
His clearly stated thesis is that “Christian life is a response to the love of God”. Not only does that make sense, especially as he develops it, but it also gave him free reign to write across most of the systematic theology corpus as he desired. That could easily degenerate in a muddled mess that said little, but in his skilled hands it became something really special. In fact, the first chapter on why we need a theology of Christian life shows his clear vision of the argument of this book. For the record, I was bought in part way through that first chapter.
Part Two with its three chapters fills in “the love of God” part of his thesis. He approaches it as love, grace and fellowship. Those three are often thrown about with a perverse shallowness. Not here. It seems that the depths of the heinousness of sin that he so astutely explains is the key to bringing those three out in all their resplendent glory. Here they sparkle.
Next, he has a section that he called an “interlude” on the Law-Gospel distinction. His Reformed orientation comes out strongest here and this section is likely to be the most controversial. In fact, even some Reformed thinkers might quibble with him.
From there, he develops the “response to” part of his thesis. This last section covers Messiah, ego and ecclesia to great effect. That our Messiah is the key is painted with the right significance. The chapter on ego was profoundly done. I thought he brought in current thinking on ego and held it up to Scripture and came up with clear thinking in the process. The two chapters on ecclesia surprised me. I was sure that he was going to champion a certain strain of liturgy, but actually he explained that every worship style is a liturgy. It was convincing to me.
I nominate this book as the theological title of the year. It is that good.
I received this book free from the publisher. I was not required to write a positive review. The opinions I have expressed are my own. I am disclosing this in accordance with the Federal Trade Commission’s 16 CFR, Part 255.
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Reviewed in the United States on May 26, 2026
★★★★★ 5
A labor of love
Format: Paperback
Kelly Kapic provides a biblical and theological vision of Christian life—what it means to love and be loved by God—by exploring and explaining the contours of the “life” that is given to the believer as united to Christ, and united to all believers who participate in that same union. The book covers multiple topics one might find in a systematic theology, but seamlessly weaves these through considerations of Christian ethics and corporate worship with clear and accessible prose. Kapic writes charitably as someone deeply immersed in the history of Christian theology and aware of the modern Christian church as expressed through multiple, and sometimes conflicting, traditions. Kapic remains attentive to the doubts of believers and profoundly sympathetic to the reality of those who have suffered abuse under the banner of grace. A remarkable achievement of beautiful orthodox theology. Highly recommended.
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Reviewed in the United States on May 11, 2026