SKU: 6482427597

Holley Sniper 2 EFI 4BBL Self Tuning Master Kit, Black (HO550-511-3XK)

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Description

Holley Sniper 2 EFI 4BBL Self Tuning Master Kit, Black (HO550-511-3XK)HO550 511 3XK HOLLEY SNIPER 2 EFI BLACK 800 cfm 4 Injector Throttle Body, 650 HP N A Part Number: HO550 511 3XK 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

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

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

Part Number: HO550-511-3XK

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 interfaces: 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 reliability
NEW Onboard contactless magnetic TPS sensor e

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Exchange/Return Notes
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SKU: 6482427597

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4.8 ★★★★★
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KayVincent
West Palm Beach, US
★★★★★ 5
Will Help You Reach the Goal You Thought You Could Never Achieve
Format: Paperback
Quick review: if you're about to go into college, BUY THIS. If you're already in college, STILL BUY THIS. This great book has conventional and unconventional advice. I'm already a fan of Cal Newport's advice and blog, but this book condenses his ideas that are most relevant to me (since I will be going to college in the fall of '15). It isn't a typical 'how to do well in college' book whatsoever. This truly gives you the truth of what needs to happen to become a part of the exceptional. And he isn't writing it with the assumed purpose of impressing everybody or becoming a mega-successful overlord; he writes with the tone that leaves up the ultimate goals you have up to you. Also, the writing style is not annoying like a lot of books are. Personally, I just want to optimize my college experience, leave my comfort zone, and get into grad school. This book will help me. If you want to start the track of becoming a super-rich, art-gallery-going, Bentley-driving, awe-inspiring successful person, this book will still be very worth your time. It's absolutely worth the money if that's what is keeping you on the edge of buying this. It has countless (actually 75) useful ideas throughout, too, if you worry it has only one or two pieces of useful advice and that's it. Bonus: if you like what you read, he has a blog with even more stuff to learn.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 5, 2014
S
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S. Quartey
Fort Morgan, US
★★★★★ 5
Fantastic Advice
Format: Paperback
I'm a senior in high school preparing for my freshman year. This book is amazing. The advice is down to earth and believable without being preachy or perfect. Newport is perfectly willing to admit that things aren't always going to go exactly as planned, but still tells his readers how to accomplish great things. I absolutely loved the advice. Some of the advice in this book is not for everyone - APPLY TO TEN SCHOLARSHIPS A YEAR can be overwhelming and unnecessary, depending on the student. That said, it's easy to see how even applying a handful of these tips would change my college career for the better. As a student who will have to balance work, class, and a social life, I think this will be rewarding. Here are a handful of my favorite tips: CREATE A SUNDAY RITUAL STUDY IN FIFTY MINUTE CHUNKS USE THREE DAYS TO WRITE A PAPER EAT HEALTHY VOLUNTEER QUIETLY And the list goes on. I will definitely pack this with me in the fall.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 11, 2010
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SK
Chelsea, US
★★★★★ 5
Get it and Use it!!
Format: Paperback
Did not get to attend an Ivy or a Top 20 / 30 / 50 most selective University / College?? - But still want to make sure you don't lose out in comparison with those students who did?? Then go get yourself a physical copy of this book - read it, use it - choose some strategies and implement it. If you did - you will ensure that you maximized your college experience and did not lose out because you didn't land up going to those selective colleges. And even if you are in those selective colleges - you can use this book to maximize the value of your opportunities during your stay at those Universities. Good Luck in your quest!!!!
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Reviewed in the United States on August 5, 2025
M
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Miss Riki
Boise, US
★★★★★ 5
Wise Advice for the College-Bound Student
Format: Kindle
I read this book after reading Newport's other study guide How to Become a Straight A Student and was looking forward to more of his easy to understand, quickly read nuggets of wisdom. Although I found the advice in his previous book to be more helpful, I did fine some words of advice that I will surely put to use in my upcoming semester. Among the gems I found, Newport reminds students to "Study in Fifty-Minute Chunks" and "Learn to Listen." In these short chapters there are ideas to help the student better utilize their time by minimizing distractions and knowing exactly what to listen for in a lecture. By far my favorite and most memorable line from this book is "A good analogy is that writing is to a college student what shooting hoops is to a basketball player." Wise advice indeed. I would recommend this book to high school an college students alike. The chapters are short and jam packed with good advice.
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Reviewed in the United States on June 25, 2012
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Erin Kennedy
Waukegan, US
★★★★★ 3
Good for some
Format: Paperback
Good advice but it's written for college students that don't work. Not for someone who goes to night school like I do.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 24, 2019

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