Pay in installments of $162.50 with
,
and
Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Sep 12 - Sep 17
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
850CFM Ultra XP Carburetor - 0-80804BKXOverview: 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 | 850 |
| 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 | 84 |
| Primary Power Valve | 4.5 |
| Primary Pump Nozzle Size | 32 |
| Product Type | Ultra XP Carburetor |
| Secondaries | Mechanical |
| Secondary Main Jet | 84 |
| Secondary Pump Nozzle Size | 32 |
| Supercharged Application | No |
| Throttle Bore | 1.750 inch |
| Venturii Size | 1.563 inch |
| Warning | California Proposition 65 |
| Warranty | Limited 90 Day |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- 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]
- Please click here for more details>>> Return & Exchange Policy
4.3 ★★★★★
Based on 28 reviews
Sort
Product Reviews
★★★★★ 5
Love it!
Size: 41 Inch Extra Long, Color: Rustic Brown
Took 3 grown men to mount but it’s been such an awesome addition to our kitchen. My wife’s coffee knook is excellent now
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 17, 2026
★★★★★ 5
Color me impressed.
Size: 41 Inch Extra Long, Color: Rustic Brown, Size: 41 Inch Extra Long, Color: Rustic Brown
My husband and I were looking for a shelf to replace the one over our coffee station. We just needed more room for travel mugs and other assorted coffee items. Most of our kitchen is done in the wood and black metal tones so when we spotted this, we were excited. We placed it in the amazon cart and purchased.
Shipping took a little while but it was packaged well and nothing was damaged. It came with everything needed to build and hang the shelf including the dry wall anchors. My husband was able to put it together fairly quickly but hanging it was a two person job. The shelf isn't SUPER heavy... but someone needs to hold it while the other person levels it and mark where to mount the anchors. Once it was up, it was sturdy and looks great!
We're very happy with this product. It is perfect for what we wanted to do :)
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 23, 2023
★★★★★ 3
Looks decent but is slightly under engineered
Size: 41 Inch Extra Long, Color: White Faux Marble, Size: 41 Inch Extra Long, Color: White Faux Marble
Five stars for packaging, quality of materials and instructions. It's a really good looking product out of the box. No scratches or defects in workmanship. Material fit and finish is very good. If you've ever assembled anything from Ikea, the hardware will seem familiar. The problems that led to me giving it 3 stars occur in the engineering. All of the weight transfer to the center with just four corner anchor points creates a sag. If you drop a 4' level across the top after installing, it's a noticeable 1/8" dip in the middle as gravity pulls on the unsupported center. If you're one of those people that notices an out of level picture on a wall from fifty paces, this is going to be a problem for you. Being that I knew it would only get worse with time and eventually make me insane, I installed a very small L bracket in the middle under the bottom shelf, pushing the entire thing up until the deflection was gone. I also tossed the anchors that came with it as those are for concrete/block walls and used metal EZ anchors that are rated for drywall. If you use the included anchors in 1/2“ drywall, there's a good chance they'll pull out. Toggle bolts would also be a good alternative. Another small detail that's missing is the lack of a plug or cover for the four exposed cams making up the vertical center support. Depending on your viewing angle and how much stuff you'll store will determine if these are visible or not. Including a simple white decal would have been reasonable. I used some white, stick-on melamine screw covers I had lying around to try and hide the cam locks better. Lastly, I wish this were made in plain white. While the faux marble somewhat matches our dining table, The veining is too pronounced. Plain white would have been better.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 26, 2025
★★★★★ 5
At last the ESV Expository Commentary is complete
Format: Hardcover
Finally the ESV Expository Commentary 12 volume set is complete. This series is a great resource for those who teach or preach from any translation of the Protestant canon.
This is a huge book, filled with valuable insights about Genesis, Exodus, Leviticus and Numbers. It’s essential for anyone interested in the Protestant understanding of the first four books of Torah.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 8, 2025
★★★★★ 5
Want to grow in your knowledge of the Bible? Then buy this book.
Format: Hardcover
If you wouldn’t dig into God’s word and go deep and learn more and more about the Bible, then this is your buy.
It is so in depth that my goal of reading through the Bible in six months had to be pushed back because the information was so amazing and so in depth that I didn’t have time to read all each day and stay on my timeline
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 15, 2025
recommand products
Flank Steak, Asian Fusion Seasoned 9oz, with Kale and Onion Potatoes + Avocado
28.95
Flank Steak, Plain 8oz, with Broccoli and 1 Cup Cranberry Almond Quinoa + Avocado
28.45
Trex 1/35 German Tiger Tracks Mirror Type 3D Printed Tracks TR85011
44.99
David G. Rowlands - They Might be Ghosts, Ghost Story, 2003, Limited, Inscribed, Signed
118.95
John William Polidori - The Vampyre, Gubblecote Press, 1974, Limited
23.95