SKU: 36503589685

Holley 550-872 Sniper Stealth 4150 Self-Tuning Fuel Injection System 4150 Flange

$742.48 $824.98
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Description

Holley 550-872 Sniper Stealth 4150 Self-Tuning Fuel Injection System 4150 FlangeOverview: The Sniper Stealth 4150 EFI system from Holley features 4, 100LB HR Fuel Injectors capable of supporting up to 650 HP naturally aspirated or 600 HP on forced induction applications. The Super Sniper Stealth 4150 EFI system from Holley features 4, 100LB HR Fuel Injectors capable of supporting up to 650 HP naturally aspirated or 600 HP on forced induction applications. The 8 injector variation is capable of supporting up to 1250 HP on forced

Overview:

The Sniper Stealth 4150 EFI system from Holley features 4, 100LB/HR Fuel Injectors capable of supporting up to 650 HP naturally aspirated or 600 HP on forced induction applications. The Super Sniper Stealth 4150 EFI system from Holley features 4, 100LB/HR Fuel Injectors capable of supporting up to 650 HP naturally aspirated or 600 HP on forced induction applications. The 8 injector variation is capable of supporting up to 1250 HP on forced induction applications. The Sniper Stealth 4150 ECU is capable of complete ignition timing control, fuel self-learning, improving idle stability, drivability, and wide-open throttle horsepower! Did we mention that the Stealth 4150 also includes transmission kick down provisions for GM TH350/400, 200R4/700R4 and Ford C4/C6 applications? Master Kits include complete fuel system with an external fuel pressure regulator preset to 58.5psi, 20ft of 3/8" Vapor Guard Fuel Hose, Fuel Pump, Filters, necessary hardware and bulkhead fitting to return fuel into the tank!

Features:

  • Bolt on 4150 flange carburetor replacement fit's a wide range of factory intake manifolds
  • Throttle body mounted ECU - no extra boxes to mount
  • Supports up to 650HP with four 100lb/hr injectors or 1250HP with eight 100lb/hr injectors
  • All of the wiring exits below the rear fuel injector cover, for a completely stealth installation.
  • Timed spark part for vacuum advanced distributors located under the front fuel bowl, for easy access to the distributor.
  • Air entry is machined to fit most stock style air cleaners with air cleaner locator provisions
  • Only 4 wiring connections required! (Battery +, battery - , switched ignition & RPM)
  • Requires use of external fuel pressure regulator, Holley PN# 12-886 or equivalent, set to a base pressure of 58.5 PSI
  • Integrated ignition timing control improves idle stability, drive-ability, and wide open throttle response
  • 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 TPS/IAC and fuel pressure regulator, for years of dependable service
  • Included clamp-on oxygen sensor kit for 2.25" exhaust ensures a leak free oxygen sensor installation, with stainless steel T-bolt clamps and a stainless steel (weldable) oxygen sensor flange
  • Also available in Black, PN# 550-871 and Shiny, PN# 550-870 finishes

 

Application:

Year Make Model Submodel Engine Size
Universal

 

Specs:

Brand Holley Sniper EFI
CFM 870
Emission Code 3
Finish Classic Gold
Flange Style 4150
Fuel Pressure 58.5 PSI
Height 3.28"
Injector Size 100 lb/hr @ 58.5 PSI
Inlet / Outlet Size 3/4-16 Female O-Ring (AN 8)
MAP Sensor 2Bar
Max Horsepower Rating 650 Naturally Aspirated
Model 4150 EFI Conversion Throttle Body
Product Type Sniper Stealth EFI
Transmission 700R4/200R4
Transmission Ford C4/C6
Transmission TH350
Warning California Proposition 65
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SKU: 36503589685

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CoolGramma
West Palm Beach, US
★★★★★ 5
State of the Art Book!
This book was recommended to me by my graduate school professor as being the most up-to-date, most inclusive book on trauma therapy that exists today, and that it is! First, it is written in an organized and coherent manner. It is extraordinarily well written and engaging which is amazing for a text of this type. It contains information on just about every subject that a beginning trauma therapist as well as a well-seasoned therapist would want to know! This is an incredible book and my only criticism is that, knowing how much I shall be referring to it, it is only a paperback and I wish it were a hardcover so that it will withstand the test of time in better condition. The price is extraordinarily reasonable when one considers the cost of most textbooks these days. I highly, highly recommend this book as a MUST read for every trauma therapist, or trauma therapist in training. I cannot say enough excellent things about the Briere and Scott text. Buy it. You will not regret it for a moment! In addition, after purchasing the DSM-V, I can say that although this book was written before the DSM-V came out, it dovetails with it extremely well, and is a perfect book to purchase after getting the new DSM-V if you don't already have Principles of Trauma Therapy. It is for anyone who is a mandated reporter also, as I am. Presently, I'm a doctoral candidate in Special Education, and find that this book will be helpful there as well. As a person who has worked directly in Special Education for over 11 years, and have had professional contact with Special Needs children for over thirty years, this book is a must--for anyone who works with children, teens, (or adults who have just disclosed trauma) whether you are in Psychology or Special Education, or any allied field that makes you a mandated reporter. The book is a MUST HAVE.
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Reviewed in the United States on April 21, 2013
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Joseph Erickson
Waukegan, US
★★★★★ 5
Excellent book for students trying to grasp PTSD
As a professor teaching post traumatic stress reaction to graduate and undergraduate students, I was looking for a book that hit the basics along with some key pieces regarding assessment, diagnostic criteria, and examples that highlighted some of the subtleties associated with complex trauma. This book is well organized and not too overwhelming for people new and beginning the field and a nice refresher for seasoned clinicians. Easy to read, clearly outlined to build upon each subject, I found it both a solid read, affordable, and made it a required read for my course. Please note that I purchased this book way back October 12, 2013 but only now getting to put my thoughts in writing.
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Reviewed in the United States on December 21, 2013
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Nikkie A. Rice
Los Angeles, US
★★★★★ 5
Mandatory purchase
Format: Paperback
Purchased for a course. Good material
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Reviewed in the United States on January 17, 2026
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Oq291
Omaha, US
★★★★★ 4
Good Book
Format: Paperback
Informative book that brings understanding and research ideas for students. Will be keeping long term for other classes to reference.
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Reviewed in the United States on May 14, 2026
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Lisa B.
Dallas, US
★★★★★ 5
Great interventions and Trauma Theory
Format: Paperback
This a great book if you work with victims of trauma and want to understand how different types of trauma can present and what interventions can be used (i.e urge surfing, cognitive restructuring, focus breathing, etc.). It also include a section about medications and what to address first in treatment. I think it’s great for new clinicians who may be looking for interventions to add to their clinical toolbox.
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Reviewed in the United States on February 4, 2020

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