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-39% Sniper 2GC EFI System

Holley is discontinuing the 2GC Sniper in all sizes and all colors. As of this writing, the Big Bore version is available in Shiny color only. When those are gone, it will not longer be produced.

EFI Replacement for the Rochester 2GC Carburetor

The first thing to ask yourself before buying the Sniper 2GC EFI System to replace the Rochester 2GC carburetor on your car or truck is, "Do my requirements mandate the use of a 2GC direct-replacement. This could be the case if you have a very tight hood clearance issue (no room for an adapter plate), if you are unwilling to replace your 2GC air filter setup and if you are interested in the easiest possible, direct-fit installation. If this is the case then this EFI system was designed with you in mind.

However, if the paragraph doesn't precisely describe you then you may want to consider the Sniper 2300 EFI System. Holley 2300 system flows far more air, costs significantly less, and can usually be adapted to any 2GC intake manifold with an inexpensive adapter. Check it out.


Check out these features of the Sniper 2GC EFI System:

  • Bolts directly to factory 2GC manifold
  • Connects directly to factory linkage
  • Mates directly to factory air cleaner assembly
  • Self-configuring, self-learning
  • Includes built-in fuel pressure regulator
  • Visually amazing 3.5-inch touchscreen provides both setup and monitoring
  • Available in Shiny Metallic, Ceramic Black, or Classic Gold
  • Available as 2GC Small or Large Bore Versions

Part Numbers

Sniper 2GC Small Bore EFI System: 550-864 (Silver), 550-865 (Black), 550-866 (Gold)

Sniper 2GC Large Bore EFI System: 550-855 (Silver), 550-857 (Gold)


The Sniper 2GC makes this easy. Toss that old 2GC carburetor because this bolts directly in place of the original 2GC carburetor on the factory manifold and connects to the factory linkage. Yes, you will install an O2 sensor and Holley makes that easy with a clamp-on O2 sensor bung--no welding required. Screw in a coolant temperature sensor, wire up power, ground, and your ignition and you've done with the EFI system installation.


Think the installation was easy? Then you will really love the configuration! A gorgeous 3.5-inch touchscreen display is included in the kit and lights up when you first key on the system. Select "Wizards" and be prepared to answer some questions so easy you'll feel like a genius. Questions like "How Many Cylinders" and "Engine Displacement". (Hint: If you need some help on that last one it's probably 258.) The Wizard completes the configuration and pre-programs a perfect start-up tune. By starting the engine and driving the tune just gets better with time--without you doing anything other than enjoying yourself.

Recommended With Your Sniper 2GC EFI System:

  • You will need an EFI Fuel System. We have several solutions!
    • We always recommend one of Holley's OE Style Fuel Modules if one is available for your vehicle.
    • A complete EFI Fuel Tank System is also a great choice.
    • If no OE module or complete Tank solution is available for your vehicle but you still want the benefits of an in-tank pump then one of these Retro-Fit Fuel Tank Modules is the right answer.
    • The Master Kit with inline fuel pump continues to be the most cost-effective and universal solution. You can choose that when you add the EFI System to your cart, above.
  • You absolutely will want a Fuel Pressure Gauge. Those who don't install one with their EFI system are invariably the ones who end up needing it. Don't be that guy!
  • The Sniper EFI System has the capability to control ignition timing in addition to providing fuel injection. If you choose this then we recommend you upgrade to the HyperSpark Distributor System.

Everyone says, "Buy From EFISystemPro.Com". Why?

When you buy it here at EFISystemPro.Com, that means we're on standby to answer your questions. Our level-3 tech support will gladly talk you through any challenge--just try to get that sort of personal 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.

CLICK HERE for T-shirt product page

Watch This Great Video On The Sniper 2GC!

Not Sure? Review this product documentation before you buy!

Owners & Installation Manual
Holley Sniper BBD EFI System

Quickstart Manual
Holley Sniper BBDEFI System

Wiring Tips
Holley Sniper EFI System

Boost ControlYes
DIS OutputsNone
Fueling StrategySpeed Density
Includes Power HarnessYes
Injector DriversTwo
Internal DataloggingAll datalogging done via external CAN bus device such as 3.5-inch handheld (included), laptop software, or digital display.
Knock Control Channels0
Nitrous ControlYes
Number of Cylinders4, 6, or 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
Display TypeLCD
FunctionsSetup, Monitor, Tuning
Gauge/Display Size3.5 Inch Rectangular
Internal StorageYes (SD Card)
Throttle Bodies
Airflow Rate (CFM)370 CFM (at 3 Inches Hg)
Barrels (BBL)2
Gaskets IncludedYes
IAC Motor IncludedYes
Injectors IncludedYes
StyleThrottle Body Injection
TPS Sensor IncludedYes
Fuel Injectors
Flow Rate (Lbs / Hr)100 PPH x2
Fuel Pressure Regulators
Pressure RangeSet (58.5 PSI at idle)
StyleIntegrated in Throttle Body
Fuel Filters
Element MaterialMaster Kit Only: Paper
Filter TypeMaster Kit Only: Inline
Micron FiltrationMaster Kit Only: Prefilter: 20 Micron / Postfilter: 10 Micron
Mounting Bracket IncludedMaster Kit Only: No
Outside DiameterMaster Kit Only: Prefilter: 1.94 Inches / Postfilter: 2.17 Inches
Harness Type7-pin Power/Ignition/Fuel Pump, 10-Pin I/O, Wideband O2, Coolant Temp, CAN Bus (All fixed to Throttle Body)
TypeAir Temperature, 2 BAR MAP and Throttle Position (Integrated in TB); Coolant Temperature, Wideband O2
Also Included3.5-inch Touchscreen Display
ApplicationDirect-Fit for intake manifolds designed for Rochester 2GC SmalL Bore Carburetor
ColorShiny Silver (550-864), Ceramic Black (550-865) or Classic Gold (550-866)
Emission Code3
Unit of SaleKit

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Sniper 2GC EFI System

  • Views: 22594
  • Brand: Sniper EFI
  • Product Code: 550-864 | 550-865| 550-866 | 550-855 | 550-857
  • Availability: In Stock
  • $1,436.00
  • $875.66

Available Options