SKU: 1869458930

Holley Sniper 2 EFI 4BBL Self Tuning System with PDM and Fuel Pump Kit, Black (HO550-511-3PK)

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Description

Holley Sniper 2 EFI 4BBL Self Tuning System with PDM and Fuel Pump Kit, Black (HO550-511-3PK)HO550 511 3PK HOLLEY SNIPER 2 EFI BLACK 800 cfm 4 Injector Throttle Body, 650 HP N A Part Number: HO550 511 3PK The #1 EFI conversion system just got better! Introducing Sniper 2 EFI a self tuning, easy to install, EFI conversion for common 4 barrel (4150 flange) style carburetors. We took everything that we learned from the original Sniper EFI system and added 14 new features that will make your EFI conversion more simple, reliable, and modern. Like

HO550-511-3PK - HOLLEY SNIPER 2 EFI BLACK

800 cfm 4 Injector Throttle Body, 650 HP N/A

Part Number: HO550-511-3PK

The #1 EFI conversion system just got better! Introducing Sniper 2 EFI - a self-tuning, easy-to-install, EFI conversion for common 4-barrel (4150 flange) style carburetors. We took everything that we learned from the original Sniper EFI system and added 14 new features that will make your EFI conversion more simple, reliable, and modern. Like all Sniper EFI systems, Sniper 2 is designed to work with the Sniper Ecosystem that includes Hyperspark ignition, complete fuel systems, multiple user interfaces/dash displays, and more.
New for Sniper 2 is the optional Power Distribution Module (PDM). This cost-effective and optional accessory isolates the core of your EFI and ignition wiring into one, easy-to-use location. Simply slide the stripped wire ends under the positive lock connector and tighten down the set screw. Battery and a switched 12-volt source is all that's required from your vehicle to power the PDM and your Sniper EFI.
Make your classic drive like a modern fuel-injected vehicle, including easy cold starts, smooth drivability, and improved fuel economy! Sniper 2 is designed to be installed at home in your garage with limited tools and the support of Holley's comprehensive installation manual and videos. The user-friendly setup wizard allows you to answer a few simple questions about your engine and the system will begin self-tuning with no laptop or tuning experience required.
If you're looking for a high-performance fuel injection system that delivers power, efficiency, and ease of use, look no further than the Sniper 2 EFI.
Main Features:

All new design - the #1 EFI Conversion just got better!
Only four wiring connections required: Battery+, Battery-, Switched Ignition, and RPM
Calibration wizard only requires that you answer a few simple questions about your engine to create a base map and begin self-tuning - No laptop required
Supports up to 650hp naturally aspirated or 575hp on boost with four 100 lb/hr injectors
(NEW) Next generation ECU features improved RF noise and interference resistance (stands up to old car wiring, noisy alternators, faulty plug wires)
(NEW) Redesigned throttle shaft and plate geometry for a smoother throttle feel
Sniper 2 is Part of the Sniper EFI Complete Ecosystem
Sniper 2 is compatible with the complete Sniper EFI Ecosystem that includes plug-n-play Hyperspark Ignition systems (coil, ignition box and distributor), fuel systems (fuel lines, fuel pump hangers), multiple displays and more
(NEW) Main harness includes plug-and-play HyperSpark distributor support, for integrated timing control, making your ignition setup hassle free
(NEW) Adaptors for other ignition types sold separately: 558-329 CD Box to Sniper 2, 558-330 MSD Pro Billet / Crank Trigger to Sniper 2

(NEW) Wide Variety of tuning and gauge display erfaces: from a 3.5-inch full color LCD Handheld, 5-inch Digital Dash, or the Bluetooth dongle, which allows you to connect either an iOS or Android based cell phone to your Sniper 2

(NEW) Optional Power Distribution Module (PDM) further simplifies wiring, especially when used in conjunction with an ignition system
Available with fuel system kits: a complete fuel system consisting of: 20 ft. of 3/8 in. Vapor Guard Fuel Hose, Fuel Pump, fuel pressure regulator, filters, necessary hardware, and bulkhead fitting to return fuel into the tank

Additional Features:
(NEW) Integrated transmission kick down provisions for GM TH350/400, 200-4R/700R4 and Ford C4/C6 applications

(NEW) "Hidden Harness" wiring harnesses exits from the rear of throttle body for a clean appearance
(NEW) Inputs and outputs consist of: 2x Ground Inputs, 2x Ground Outputs, 1x TPS output (0-5v), and 1x Tach Output
(NEW) Redesigned injector connector for improved

Shipping Notes
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Exchange/Return Notes
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  • Final sale items are not eligible for returns or exchanges.
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SKU: 1869458930

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Kailey Goodman
Fort Morgan, US
★★★★★ 5
Great for NP school
Format: Paperback
This is very informative and easy to read! No fluff but just the nitty gritty of what you need to know
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Reviewed in the United States on May 13, 2025
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Ryan Michael Skinner
Lexington, US
★★★★★ 5
Good
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Reviewed in the United States on August 4, 2025
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AS
Pawtucket, US
★★★★★ 4
Good condition
Format: Paperback
It was received in time, good quality slightly used but neat. Got the job done.
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Reviewed in the United States on May 30, 2026
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Pawtucket, US
★★★★★ 5
Just as expected
Format: Paperback
Good quality for a class required textbook.
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Reviewed in the United States on December 9, 2024
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Me
Lake Worth, US
★★★★★ 1
Very basic
Format: Paperback
The idea of the book is to be condensed and concise but there is too much information that should be expanded on that is not. The writers of this book seem to think students using the book have a strong pediatric background but for FNPs that isn’t always the case. I found myself having to do research outside of the book to understand the chapters. Also there were many typos and mislabeled diagrams.
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Reviewed in the United States on October 14, 2023

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