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-10% Holley Sniper 2 EFI Upgrade Kit

Because Holley Thought You Might Be Interested...

Yes--Holley does offer an upgrade kit for owners of the original Sniper to move to the Sniper 2.

But before you make a purchase decision, let's qualify for whom this will be of benefit.

First, let's look at what's not included that you have to "bring over" from your exising kit or buy separately:

  • Sniper Main Wiring Harness
  • Sniper O2 Sensor
  • Sniper Coolant Sensor
  • Sniper I/O Harness
  • Clamp-On O2 Sensor Bung (if needed)

This in addition to the normal things that you might need to complete any Sniper EFI installation, such as fuel system, air cleaner, ignition, etc. In particular, note that the Sniper 2 does NOT have a built-in fuel pressure regulator option, as did the original 4150 Sniper.  If you are currently using that regulator, the upgrade kit offers an optional external fuel pressure regulator for an additional cost.

...and how much am I saving?

Well, that depends on whether or not you're replacing a Sniper with built-in fuel pressure regulator and if you're in fact using that regulator currently. If you already have an external fuel pressure regulator on your vehicle then you'll save $200 from the cost of a complete Sniper 2 kit with the same options. If you are currently using the built-in regulator on your original-style Sniper, that savings drops to $100 if you opt to include a regulator in your upgrade kit..

That's not a big difference. Is this upgrade going to benefit me?

That's a decision you're going to have to make. But I might suggest that unless you have an unthinkable number of hours invested in installing your current wiring harness that it is better to pay the fairly trivial difference and get the whole new Sniper 2 EFI System. That way you can uninstall your existing Sniper completely and proceed with brand new components. Moreover, you now have a complete original Sniper which could be either sold, gifted, or repurposed on another project.

Okay, so what are my options here?

Holley offers upgrade kits in either the polished or black version (sorry, no gold) and with or without an external fuel pressure regulator. Further, like the complete Sniper 2 EFI Systems, the upgrade kits are available either with a bluetooth module (use your cell phone as a display), a 3.5-inch Digital Display, or the new 5-inch Digital Dash., Note that the 3.5-inch display from your original Sniper is not compatible with the Sniper 2.

Whether you buy a new Sniper 2 or or the Sniper 2 Upgrade from EFISystemPro.Com, included at no additional charge is our Level 3 Platinum EFI System Support. Our Tier-3 certified support technician will gladly talk you through any challenge--same price, but just try to get that sort of personalized service from a big-box auto performance store! Because here at EFISystemPro.Com, our look is high-end professional, but our service after the sale is home-town helpful!

Don't Miss This! FREE Sniper EFI T-shirt with every Sniper EFI system purchased from EFI System Pro!

This T-shirt is yours for $0.00 with your Holley Sniper EFI System purchased from EFI System Pro. Simply choose between Black and Dark Gray and designate your T-shirt size in the dropdown when adding the Sniper system to your shopping cart.

Watch This Great Video On The Sniper 2 EFI System

Not Sure? Review this product documentation before you buy!

Owners & Installation Manual
Holley Sniper 2 EFI System (Coming Soon)

Quickstart Manual
Holley Sniper EFI System

Wiring Tips
Holley Sniper EFI System

Boost ControlNo
DIS OutputsNone
Fueling StrategySpeed Density
Includes Power HarnessYes
Injector DriversFour
Internal DataloggingNo. All datalogging done via external CAN bus device such as 3.5-inch or 5-inch handheld (included), laptop software, or digital display. Datalogging not available via Bluetooth module.
Knock Control Channels0
Nitrous ControlYes
Number of Cylinders4, 6, 8 Cylinder (Even Fire Only)
User Configurable I/OYes
User-Selectable MAP StorageNo
Water-Methanol ControlNo
Displays And Controllers
Auto BrightnessNo
CAN Bus CapableYes (Specific to Holley ECUs Only)
Case/Bezel FinishBlack
ConfigurableMonitor dozens of pre-configured metrics provided by the ECU, including sensors, air/fuel ratio, switched outputs, drive-by-wire data, and more.
Data LoggingYes (3.5-inch and 5-Inch Only)
Display TypeLCD
FunctionsSetup, Monitor, Tuning
Gauge/Display Size3.5 Inch Handheld Display, 5-inch Digital Dash, or Bluetoogh Module
Internal StorageYes (SD Card on 3.5-Inch and 5-Inch Only)
Throttle Bodies
Airflow Rate (CFM)800 CFM (at 1.5 Inches Hg)
Barrels (BBL)4
Gaskets IncludedYes
IAC Motor IncludedYes
Injectors IncludedYes
StyleThrottle Body Injection
Throttle Bore Diameter (ea)42.86mm
TPS Sensor IncludedYes
Fuel Injectors
Flow Rate (Lbs / Hr)100 PPH
Harness TypeReuses 7-pin Power/Ignition/Fuel Pump, 10-Pin I/O, Wideband O2, Coolant Temp from original Sniper system, not included.
TypeAir Temperature, 2 BAR MAP and Throttle Position (Integrated in TB); Reuses Coolant Temperature, Wideband O2 Sensors from original Sniper EFI System (not included)
ApplicationUniversal (Requires intake manifold for square bore carburetor or adapter there-to)
ColorShiny Metallic or Black
Emission Code3 - This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles
Unit of SaleKit

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Holley Sniper 2 EFI Upgrade Kit

  • Views: 7807
  • Brand: Sniper EFI
  • Product Code: 550-510-3AX | 550-511-3AX
  • Availability: In Stock
  • $1,077.95
  • $969.95

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