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Description
Holley Sniper EFI 550-869 Holley Sniper EFI QuadrajetOverview: Are you tired of rebuilding the 50+ year old Rochester Quadrajet (Q Jet) on your classic Chevrolet, GMC, Buick, Oldsmobile, or Pontiac? Introducing Sniper EFI Quadrajet. The first bolt on spread bore electronic fuel injected throttle body system that does not require any additional adapters, sealing plates, or intake manifold swaps! The Sniper EFI Rochester Quadrajet (Q Jet) system retains the same great features as the 4150 Sniper EFI
Overview:
Are you tired of rebuilding the 50+ year old Rochester™ Quadrajet® (Q-Jet™) on your classic Chevrolet, GMC, Buick, Oldsmobile, or Pontiac? Introducing Sniper EFI Quadrajet™. The first bolt-on spread bore electronic fuel injected throttle body system that does not require any additional adapters, sealing plates, or intake manifold swaps! The Sniper EFI Rochester Quadrajet™ (Q-Jet) system retains the same great features as the 4150 Sniper EFI version such as; four 100lb/hr Injectors, built-in timing control, a 3.5" full-color touchscreen, and much more! The throttle body will support up to 500 horsepower naturally aspirated. In addition to all of these great tried and true features, the Sniper EFI Rochester Quadrajet™ (Q-Jet) system will fit most stock air cleaners and offers multiple fuel inlet configurations that allow for a stock appearing installation!
Features:
- Available in 3 Finishes - Classic Gold, Shiny and Black Ceramic
- Designed to deliver the signature Rochester Roar at Wide Open Throttle!
- Throttle body mounted ECU - no extra boxes to mount
- Supports up to 500hp with Four 100 Lb/Hr Injectors!
- Only 4 Wiring Connections Required! (Battery +, Battery - , Switched Ignition & RPM)
- Integrated ignition timing control
- Transmission provisions on throttle lever for TH350/TH400 and 200R4/700R4
- Fits most stock Rochester Quadrajet (Q-Jet) air cleaners
- Brake Booster adapter included, if required
- Universal Throttle and transmission kickdown bracket included
- 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 Throttle Position Senser (TPS)/ and Idle Air Control (IAC) 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
- Requires external fuel pressure regulator, such as: 12-886 or 12-879
- Certified to ISO 8846, SAE J1171 & United States Coast Guard Requirements for Ignition Protection & Fire Resistance. Making Sniper EFI the perfect choice for carburetor to marine fuel injection conversions!
- A Flame Arrestor is REQUIRED for marine installations, such as part number, 720-1 or 720-13
- Patent Pending
Application:
| Year | Make | Model | Submodel | Engine Size |
|---|---|---|---|---|
| Universal |
Specs:
| Brand | Holley Sniper EFI |
|---|---|
| CFM | 715 |
| Coast Guard Approved | Yes |
| Emission Code | 3 |
| Finish | Classic Gold |
| Flange Style | Spreadbore |
| Fuel Pressure | 58.5 PSI |
| Height | 3.28" |
| Injector Size | 100 lb/hr @ 58.5 PSI |
| Inlet / Outlet Size | 9/16-18 Female O-Ring (AN 6) |
| MAP Sensor | 2Bar |
| Max Horsepower Rating | 500 Naturally Aspirated |
| Product Type | Sniper 4BBL TBI Kits |
| Throttle Bore | 1.375 Primary / 2.00 Secondary |
| Transmission | 700R4/200R4 |
| Warning | California Proposition 65 |
Shipping Notes
- Free Standard Shipping on $100+ Orders 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.
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4.6 ★★★★★
Based on 1187 reviews
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Product Reviews
★★★★★ 5
Lovely
Format: Paperback
Good book, but you know the usual has its fluff, but that’s all Robert Green books. However, the stories are unmatched and if you have a vivid imagination, you’ll be able to understand and comprehend what’s going on ,it’s lovely.
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Reviewed in the United States on May 28, 2026
★★★★★ 4
Different, but in a good way
Format: Paperback
I have read all of Robert Greenes previous books, and I always walked away in amazement. I would see the negative reviews those books received, but I would always ignore them and thank God that I did. That compelled me to buy this book once I saw it was released and once again, the negative review bugs are back out. Normally, I wouldn’t write a review on a book because I would rather the reader form their own opinion. This book is different, and I would like to address this for anyone who is a Robert Greene fan or in the process of becoming one.
This book is exactly what every human alive needs to read, which is why I am writing this review to stop the second guessers. It focuses on how our emotions are destructive and how we must be careful about how freely we let them out now. Yes, the style is different from his past books. He goes into narratives about the different emotions, what they can do, and how we can control them while occasionally touching on how they played out in history. For many fans of his previous books, this can be disappointing as we are used to reading thrilling tales throughout history and how they play into the law he is explaining in that chapter with side bar quotes of knowledge from historic figures. I understand why he could not take that approach with this book, as he wanted to focus more on explaining the emotions on a psychological level instead of a historical one.
Is there entertaining and historic tales in the book? Yes, somewhat but nowhere near like his past books. I ask that you open your mind to this book and allow your knowledge to grow in a world where emotional control is decaying. Like he said in this book, don’t let your emotional impulses cloud your judgement. Step back, take a second, reassess and approach this book with a clear mind. You will thank me for it.
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Reviewed in the United States on May 31, 2020
★★★★★ 5
A must read for all young and old, although, the younger, the better!
Format: Kindle
Simply fabulous! The blend of great concepts, beautifully descriptive stories, insightful analysis, and fascinating narration made it a truly engaging experience.
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Reviewed in the United States on March 9, 2026
★★★★★ 5
In-depth and comprehensive
Format: Kindle
This book was so full of information about the human animal. Is the only wish I had this information earlier in my life. I wish my kids would read it, and perhaps they will. It's very in depth and leaves me reflecting on how I want to change some of my thinking and behaviors like no other book I've read. I wish I belonged to a book club just to discuss it with other readers!
I don't necessarily agree with everything that the author states. But it was a most thought provoking book and I read allot of books! Allot of work went into the writing of this book. Near perfect editing which I appreciated. I am a big fan of human psychology and it held my interest and kept me up too late not wanting to put it down!
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Reviewed in the United States on February 20, 2026
★★★★★ 5
Kubrick’s revelatory swan song is full of hidden meanings
An underrated masterpiece, Eyes Wide Shut is a gem layered with meaning. A semi-autobiographical sensibility permeates given the parameters of its production. It’s immaculately shot, edited and designed and offers two central performances from the then married Tom Cruise and Nicole Kidman. Given its theme, their subsequent divorce reflects back on the choppy waters faced by their characters Bill and Alice Harford.
The result is a dream logic of coincidences that ensnare a married couple in self doubt and sexual angst. They live a fairly privileged life in a Manhattan apartment but after a Christmas party at a huge mansion owned by an elite acquaintance, the relationship begins to unravel when both are confronted by the consequences of their projected desires. This prompts the husband Bill on an odyssey through a night time New York and an escalating series of encounters as his wife’s confession about an infatuation with another man eats away at his own inner, unfulfilled desires.
It’s a dark/light solstice of a film, as man and wife chase fatalistic hidden desire, their marriage subject to dissolution and they plunge through a dark night of the soul and emerge into a morning of earnest confession and much soul searching.
In the end, it’s a fascinating watch. Quite revelatory given my initial reception to it many decades ago. But that’s Kubrick for you. It’s essential to revisit his films. Beautifully presented in 4K by Criterion, it asks us to take ownership of our inner desires, to confront them with honesty and discern what is merely a dream from the reality around us. And no, it’s not the erotic thriller the marketing promised. Another desire thwarted or a deliberate obfuscation of the intense psychological drama it really was?
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Reviewed in the United States on January 26, 2026