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• Self Tuning - No Laptop Required
  You don't have to be a computer/tuning wiz to have EFI! 4 questions and you're ready! The included Genuine Bosch LSU 4.9 Wideband Oxygen Sensor provides realtime Fuel Map Learn!
• Simple Wiring
  Only 4 Wiring Connections Required! (Battery +, Battery - , Switched Ignition & RPM)
• Bolt On Installation
  Simple dual pattern bolt on installation to go from carbureted to EFI!
• From Stock To Over 1500 Horsepower
  Whether you're Naturally Aspirated or Boosted, Sniper has you covered up to 1500HP!
• 3.5 in. LCD Display
  Serves as a tuner and a digital gauge display, all at the palm of your hand.
• Integrated ECU
  Eliminates the need of mounting an external box, saving you time and money.
• Sniper Is An ECOSYSTEM
  Pairs seamlessly together with Holley's Sniper Hyperspark Ignition, Fuel Systems, and Digital Dashes to complete your EFI conversion.

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Tech Spotlight: How Sniper 2 Is Taking Plug-And-Play EFI To The Next Level - 07/18/2023

When Holley Performance introduced the original Sniper EFI system back in 2015, it kicked off a revolution in fuel injection conversions. The goal was simple: Make EFI simple and affordable for folks who’re looking to make the jump without completely reinventing their vehicle’s setup.

“The new system benefits from everything we’ve learned with Sniper 1 as well as the feedback that customers have provided to us,” /.../ “The throttle body, linkage, and key elements of the circuitry have been redesigned from the ground up for Sniper 2, and it offers a host of new features and capabilities. The development of the new system also provided us with the opportunity to streamline the system component selection process to ensure that customers get something that meets the specific needs of their project – whether that’s a basic EFI conversion, or something more comprehensive.” - Read More

How to Install a Sniper HyperSpark Ready-to-Run Distributor - 06/24/2022

HyperSpark Ready-to-Run distributors are the perfect solution for those running a Holley Sniper EFI and in need of affordable, plug-and-play ignition timing control. - Read More

Deep Dive: Sniper EFI 5-Inch Touchscreen Digital Dash - 03/03/2022

There are many performance benefits of running a Sniper EFI system, but one of the key points of any Holley Sniper is that you don’t need a laptop for programming the system. The supplied 3.5-inch color touchscreen provides easy access to the data and calibration points required to get the EFI system dialed-in for your system. - Read More

Teaching Ancient Jeeps New Tricks Out On The Trails With Sniper EFI - 05/09/2022

Nick Oxender hit our radar when he put a Sniper Autolite 1100 EFI system onto his Willys' "Go-Devil" four-cylinder engine. Ever since then, he's been busy proving just how well the system works as he tests his Jeep out in the ways only Jeep people can. - Read More

Sniper EFI Installation Guide - 02/25/2020

So you're ready to switch from carburetor to fuel injection, but you're unsure of what all is involved. This guide will walk you through a basic installation including what parts are necessary to swap as well as what to watch out for. - Read More

Going In-Depth With The Sniper Stealth 4500 EFI System - 05/19/2021

While old habits and proven strategies can be hard to shelve, the advantages offered by EFI systems like the Sniper Stealth 4500 EFI can take an already-effective race program to the next level. - Read More

Going In-Depth With Holley's Terminator X Stealth 4500 EFI System - 03/16/2021

Hot on the heels of the Terminator X Stealth 4150 EFI system that debuted earlier this year, Holley has now added the Terminator X Stealth 4500 EFI system to the lineup. As the name implies, the new hardware is designed to work with 4500 flange intake manifolds, but this system is much more than just a carburetor replacement that’s designed to improve drivability and throttle response. - Read More

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Holley Sniper 2 EFI: The #1 Selling EFI Conversion Just Got Better

Holley Sniper 2 EFI: Your Complete Installation Guide To Sniper 2

Sniper EFI Ignition Systems Overview                                                

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Holley Sniper EFI How It's Made - Time Lapse                                    

How To Build A Custom Timing Table - Sniper EFI          

Holley Sniper EFI Firmware Update

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Comparing the Holley Sniper EFI vs Carburetor on a Willys Jeep

How to Fuel Inject Your Willys L134 With a Holley Sniper                  

Upgrade Your Sniper EFI System with a 5in Digital Dash