Holley Sniper EFI 4BBL Self Tuning System - Shiny Finish (HO550-518)
SKU: 65751080684

Holley Sniper EFI 4BBL Self Tuning System - Shiny Finish (HO550-518)

Sale price$1866.60 Regular price$2074.00
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Description

Holley Sniper EFI 4BBL Self Tuning System - Shiny Finish (HO550-518)HO550 518 SUPER SNIPER 4BBL EFI SYSTEM 800 cfm 4 Injector Throttle Body, 650 HP Forced Induction Part Number: HO550 518 Introducing Holley Super Sniper EFI! Looking to convert your blow thru carbureted turbo engine to EFI? Look no further than Holley for the Super Sniper 4150 EFI systems featuring 8, 100LB HR Fuel Injectors capable of supporting up to 1250 HP on forced induction or dry nitrous applications. Is your combination not producing that much

HO550-518 - SUPER SNIPER 4BBL EFI SYSTEM

800 cfm 4 Injector Throttle Body, 650 HP Forced Induction

Part Number: HO550-518

Introducing Holley Super Sniper EFI!
Looking to convert your blow thru carbureted turbo engine to EFI? Look no further than Holley for the Super Sniper 4150 EFI systems featuring 8, 100LB/HR Fuel Injectors capable of supporting up to 1250 HP on forced induction or dry nitrous applications. Is your combination not producing that much horsepower? No problem, Holley also offers a 650 HP four injector version for lower horsepower applications with a power adder or someone just needing additional sensor inputs. Did we mention the Super Sniper also has full nitrous control built-in? That's right, no need for a separate nitrous controller! Every Super Sniper EFI system also comes with a USB to CAN tuning cable, as well as free downloadable Sniper EFI Software to give you unlimited control of your engine.
Features:
650 HP version features four 100 Lb/Hr Injectors
Compatible with Draw-Thru or Blow-Thru forced induction applications
User-frie ndly Boost Control with handheld adjustability
Programm able Target Air Fuel Ratios per Boost level
Advanced boost control is available via free Sniper EFI tuning software, including Boost vs RPM and Boost vs Time - Same popular boost control offered in Holley HP and Dominator EFI systems!
2.5 Bar MAP sensor included which safely works on applications up to 21.5 PSI
Built-in Single stage progressive nitrous control
Dry or Wet Nitrous Support
Progressive or Non-Progressive control strategies
Lean/Rich AFR Cutoff
Time or RPM based Timing Retard and much more!
Integrated ignition timing control for precise timing curves
Programmable inputs and outputs
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
Internal fuel pressure regulator eliminates the hassle of plumbing an external fuel pressure regulator (Preset to 58.5 PSI) for N/A or Nitrous applications
Self-tuni ng ECU means you don't have to be a computer/tuning wiz to have EFI!
Only 4 Wiring Connections Required! (Battery +, Battery-, Switched Ignition & RPM)
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!
The included Genuine Bosch LSU 4.9 Wideband Oxygen Sensor provides real-time Fuel Map Learn!
OEM Style TPS/IAC and fuel pressure regulator, for years of dependable service
Included 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
Throttle body mounted ECU - no extra boxes to mount
USB to CAN Communication cable included for easy laptop tuning of advanced controls
Dual Pattern bolt on carburetor replacement, designed to fit 4150 Flange & Spread Bore manifolds - (Spread Bore Sealing Plate Part #9006 recommended)
Compatibl e with Holley EFI analog gauges and electronic dashes

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]
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SKU: 65751080684

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Lateefah
Louisville, US
★★★★★ 5
Nice and easy to assemble
Color: Black, Size: Standard - 4 Panel
I absolutely love this 4-panel room divider! It was super easy to assemble — I had it set up in just a few minutes. The material isn’t too see-through, which gives just the right amount of privacy while still letting some light through. It does exactly what I needed it to do and looks so clean and sleek in my space. Perfect balance of style and function — highly recommend!
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Reviewed in the United States on November 7, 2025
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Virginia C.
Phoenix, US
★★★★★ 5
A quick private space
Color: Black, Size: Standard - 4 Panel
Went together easily, just the right height and width for just a bit of privacy.
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Reviewed in the United States on March 3, 2026
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Jeff
Lake Worth, US
★★★★★ 5
Light weight and large privacy screen
Color: Black, Color: Black
The privacy screen is light weight and of great quality. The screen can block sight and also is easy to set up. It screen is sturdy and stable. It is a cheap solution for separating paces in rooms. The privacy screen is of black color and good good in many places. It can be folded when not used and does not take much space for storage.
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Reviewed in the United States on December 19, 2025
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Tiffany
Houston, US
★★★★★ 5
Great divider!
Color: Black, Color: Black
This was really easy to set up and really works to decide the room. The material is dark enough that you have your privacy. Good for the price
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Reviewed in the United States on January 2, 2026
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Olivia Tucker
Whiting, US
★★★★★ 3
Over all review
Color: Black
It’s not a bad divider, the instructions are okay but once I figured it out on my own it was easy. The quality is fine I like how it’s made of metal. The only downside is fall for me is the height. I’m 5”4” yet it’s suppose to be 6 feet tall but it seems to be a little shorter than that. If it was taller and the instructions a little more clear it would get 5 stars.
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Reviewed in the United States on May 25, 2026

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