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:
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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: 65751080684

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Claire K
Carnegie, US
★★★★★ 5
Amazing beautiful blanket
Color: Marble Beige & Grey Chocolate, Size: 60"x80"
Just received this beautiful blanket , it came in a black box . So happy I would like to buy another one It’s a great quality very soft it’s not thin it has a good weight to it , beautiful colors of gray white and gray and dark chocolate That one is 10 stars for sure , I recommend buying this one Love Love. It
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Reviewed in the United States on May 27, 2026
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Shelby
Natrona Heights, US
★★★★★ 5
The most amazing blanket EVER!!!
I just got this yesterday and I’m obsessed already. It’s the softest thing I’ve ever touched. The reverse side is also a super soft velour-like feel. I got the Marble Charcoal Grey in 60x80. It looks exactly like the photos and it’s truly a bubble design too. Looks so good draped across my bed. And it’s HEAVY! Literally feels like a weighted blanket on top of being unbelievably soft and cozy. Now I want to get the largest size for even more heavy, snuggly bliss. I slept with it last night along with my normal blanket and I fell asleep much quicker than usual. It does shed a bit on my black clothes but I don’t even care lol. The packaging it arrives in makes it wonderfully gift-able and also lets you know it’s a women-owned company. Didn’t arrive with any bad smells either. All the stitching is immaculate, really everything about this blanket is. I got it on a Black Friday deal for $20% off at $51, it’s worth every penny and feels like a steal to be honest. The quality is unmatched. I’ll have to refrain from buying every single color!
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Reviewed in the United States on November 23, 2025
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Chelsea, US
★★★★★ 4
Like it. Good value.
Color: Ivory White, Size: 60"x80"
I like it. It’s furry, obviously acrylic but soft and I like the feel of it.
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Reviewed in the United States on April 27, 2026
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Bruins babe
Birmingham, US
★★★★★ 5
Worth every penny
Color: Ivory White, Size: 90"x90"
This blanket is so soft and comforting, I just love it! It arrived sealed in a plastic bag and fluffed up instantly, I briefly put it in the dryer on low and it came out absolutely perfect. There was no odd smell, no loose threads, it was very well made and looks so inviting on my bed! Definitely a great buy that will keep you warm.
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Reviewed in the United States on February 9, 2026
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EMS
Dallas, US
★★★★★ 5
Definitely genuine pelts.
Size: 2' x 3' (Natural shape, Sheepksin, Oblong), Color: Ivory White
I like the color. Not too white, more of a natural shade. I ordered two, for each side of the bed. One is larger than the other which proves they are genuine pelts and I’m ok with it!!
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