Holley Sniper EFI XFLow 4BBL Self Tuning System - Black Ceramic (HO550-541)
SKU: 39366981107

Holley Sniper EFI XFLow 4BBL Self Tuning System - Black Ceramic (HO550-541)

$1750.95 $1945.50
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Description

Holley Sniper EFI XFLow 4BBL Self Tuning System - Black Ceramic (HO550-541)HO550 541 HOLLEY SNIPER EFI BLACK 800HP 900 cfm 4 Injector Throttle Body, 800 HP N A Part Number: HO550 541 Introducing Sniper EFI XFlow! Are you building a naturally aspirated engine up to 800 Horsepower? Looking to convert your blow through carbureted turbo engine to EFI? Look no further! The Sniper EFI XFlow from Holley features 4, 120LB HR Fuel Injectors and flows 900CFM allowing it safely supporting up to 800 HP on Naturally Aspirated engines.

HO550-541 - HOLLEY SNIPER EFI BLACK 800HP

900 cfm 4 Injector Throttle Body, 800 HP N/A

Part Number: HO550-541

Introducing Sniper EFI XFlow! Are you building a naturally aspirated engine up to 800 Horsepower? Looking to convert your blow through carbureted turbo engine to EFI? Look no further! The Sniper EFI XFlow from Holley features 4, 120LB/HR Fuel Injectors and flows 900CFM allowing it safely supporting up to 800 HP on Naturally Aspirated engines. The XFlow comes with an internal 2.5bar MAP sensor that will safely work on boosted applications up to 21.5 psi. For applications making more than 21.5 psi, and has three additional 0-5v Sensor Inputs which can be used for an external MAP Sensor, or Dome Pressure for boost control, as well as oil pressure and fuel pressure. An External Fuel Pressure regulator is required; we recommend part number 12-848 for N/A applications.
Features:
Supports up to 800HP N/A with 4 120 Lb/Hr Injectors
Flows 900CFM, making it perfect for high rpm N/A engine combinations
Compatibl e with Draw through or Blow through forced induction applications
2.5Bar MAP Sensor
Integrated ignition timing control
Built in Single stage progressive nitrous control
User friendly Boost Control with handheld adjustability
Programm able Target Air Fuel Ratios per Boost level
Advanced boost control available via free Sniper EFI tuning software, including Boost vs RPM and Boost vs Time.
Three Programmable 0-5V Sensor Inputs for Oil/Fuel/Dome or Nitrous Pressure Sensors
Six Programmable Ground Outputs
One +5v Reference Output - +5V Power Supply for 0-5v Sensors
One Sensor Ground - Ground supply for 0-5v Sensors
Dual Pattern bolt on carburetor replacement, designed to fit 4150 Flange & Spread Bore manifolds - (Spread Bore Sealing Plate Part #9006 is recommended)
Throttle body mounted ECU - no extra boxes to mount
Only 4 Wiring Connections Required! (Battery +, Battery - , Switched Ignition & RPM)
Requires an external fuel pressure regulator: P/N 12-848 up to 800 HP
High Resolution Full Color Touchscreen for Initial Setup, Tuning, and Gauge Displays
Simple Calibration Wizard (Answer a few questions about your engine and it creates the base map, then starts tuning on its own!) - NO laptop required!
Self-tuning ECU means you don't have to be a computer/tuning wiz to have EFI!
The included Genuine Bosch LSU 4.9 Wideband Oxygen Sensor provides realtime Fuel Map Learn!
OEM Style TPS/IAC and Fuel Pressure regulator, for years of dependable service.
Included 2.5" clamp-on oxygen sensor kit ensures a leak free oxygen sensor installation, with Stainless Steel T-Bolt clamps and a Stainless Steel (Weldable) oxygen sensor flange

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. 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
SKU: 39366981107

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4.0 ★★★★★
Based on 1894 reviews
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Verified Purchase
S knight
Fort Morgan, US
★★★★★ 5
Brilliant for travelers. Makes life so easy
As travelers know, most hotels in Europe tend to be older (bonus for 100+ years) and may have a single outlet in the room. I looked for something like this IN Europe to no avail. My husband argued that I didn't need such a thing, but we travel with 2-3 laptops and 2-3 cellphones between us if work is involved. This adapter is AWESOME! I can't tell you how much I love it. It gives you extra space for the one wide charger we all are stuck with, without crowding out the middle plug. It put the USB ports above the outlets, not below, so your plugs don't block access. It is lightweight, compact, and has a long enough cord to reach where you need it to go. My husband has now absconded with it and I'm buying a second one. It is worth every penny and every inch of space it takes; both of which are minimal. Fantastic product. NOT paid for review, just LOVE LOVE this thing.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 19, 2023
S
Verified Purchase
Sherm
Port Orchard, US
★★★★★ 5
Perfect for Traveling
I bought this last minute as I couldn't find my other power adaptor and I'm glad I did. I used it traveling around the Mediterranean and it was perfect. The "surge protector" design worked well. It has regular plug outlets as well as USB-B and USB-C connectors. W as able to charge my phone, iPad and watch at the same time. It stored easily in my suitcase and didn't take up too much space. I am very pleased with this product.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 10, 2024
A
Verified Purchase
AmyP
Draper, US
★★★★★ 5
Perfect 220V Power Extender
Used this on a recent European trip and it worked perfectly, providing me with the extra outlets I needed to power my PC, multiple chargers and phones. European pin connection with US outlets and USBs. If you are planning to go to a country with 220V, don't expect to use a 110V extender with a plug connector - it may well burn out (though most electronics will work fine when connected to 220 via their chargers and power supplies). This one is compact and easy to pack. I have a larger 220v strip purchased for another trip and this one will be traveling with me from now on due to its compact size and lower weight.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 18, 2024
J
Verified Purchase
Jmar8196
Omaha, US
★★★★★ 4
Absolutely great for travel but not enough wattage to charge a macbook without the macbook brick.
So this thing is absolutely amazing for travel. The extension cord is a great length. The usb ports are secure and snug and it really works very well, it's by FAR my favorite adapter to travel with. I do have one nitpick - the photos clearly show it charging a macbook and yes, it can but not with a straight cable you still need to plug in the macbook power brick to it. I was hoping to avoid that but this adapter does not have enough wattage to charge a macbook without the brick. I included two photos showing the difference in wattage between this and an macbook power brick.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 3, 2022
G
Verified Purchase
GEO
Alexandria, US
★★★★★ 5
Great for use in Italy!
We spent 3 weeks in Italy in May of 2023. This was so easy to use for making sure all of our cell phones and power bricks were fully charged for the next day of discovery while in Italy. Plugged in effortlessly everywhere we stayed in Italy. We used all the charging ports and the USA outlets for two dual voltage power packs (remember the Italian grid is 240VAC not 120VAC like in USA) and my dual voltage CPAP power brick. No problems any where - it worked flawlessly. I would not suggest using it for curling irons or blow dryers or any very high wattage devices and anything you plug into it that does not say dual voltage on the device may be destroyed and possible catch fire! So do be aware of what you use with it as it does not drop the voltage to 120VAC from the 240VAC Italian wall outlets. Nice feature is that it comes with an adapter you can use when you get back to USA so you can use it at home till you pack your bags for the next trip!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 15, 2023

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