Holley Sniper EFI Self-Tuning Kit - Black Ceramic Finish

Item #: 6643
Holley Sniper EFI Self-Tuning kit + handheld EFI monitor- Black Ceramic finish
Manufacturer Suggested Retail Price: $1,111.95

Our Price:


NEW! Holley just brought EFI within range!
The new Holley Sniper EFI is economically priced so you can have all the benefits of EFI and still have money to finish or upgrade the rest of your ride! Perfect for street rods, muscle cars, off road trucks or nearly any carbureted vehicle.

Put an end to cold start issues, hesitations, vapor lock, and flooding. Upgrade to Sniper EFI and get the tactical accuracy of EFI today!

  • Bolt on carburetor replacement (designed to fit single & dual carb manifolds)
  • Throttle body mounted ECU – no extra boxes to mount
  • Supports up to 650hp (4 injector version) and 1250hp (8 injector version)
  • 4 wire vehicle connection (Battery +, Battery - , Switched Ignition & RPM)
  • Integrated fuel pressure regulator
  • Integrated ignition timing control & coil driver
  • Color touchscreen for setup and gauge views
  • 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!
  • Available in base & master kits (Master kits include complete fuel system: fuel pump, filters, feed and return hose and all fittings including fuel tank return line bulkhead fitting.)
  • The included Wideband Oxygen Sensor provides realtime Fuel Map Learn!

Brand Holley Sniper EFI CFM 800
Emission Code 3
Finish Black Ceramic
Product Type Sniper 4BBL TBI Kits
Throttle Bore 1.6875 (1 11/16ths)

This part is legal for use on Uncontrolled (Non-Emissions Controlled) Vehicles or Racing Vehicles.

    The following vehicles are considered Uncontrolled (Non-Emissions Controlled) Vehicles:
  • 1965 and older U.S. manufactured California Certified vehicles
  • 1967 and older U.S. manufactured Federally Certified vehicles
  • 1967 and older Foreign manufactured vehicle
  • Racing Vehicles are vehicles that are used exclusively for racing or other forms of competition that are not registered and that may never be used on the street.

Watch the Video!

WARNING: This product may contain chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
Holley Sniper EFI Self-Tuning Kit - Black Ceramic Finish
Item #: 6643


Holley Promo
How To Install

Product Reviews

Write a review

Classic Name but.....
Jun 14, 2017  |  By Evan
Review star icon Review star icon Review star icon Review star icon Review star icon
I went with the Holley because it was a well established name, however, I ran into various issues throughout the build. I didn't get the master kit, therefore, I bought the Fi-Tech inline fuel pump kit (works great btw), with a Sherman non-EFI tank - all mounted externally. (this backend set-up works amazing btw!) The install went pretty good for 4 days until the CPU turned on reading 100% throttle before ignition. As it wouldn't crank the Holley Tech suggested I replace the Throttle Position Sensor, and the External Relay - I did yet still the same problem. After speaking to Holley again they had me send the unit back to them for testing and the reply was "this issue is 1 in 1000" apparently they crossed the wires inside the unit at the factory (made in china) and quality control missed it. Beware if you have this issue after an install - it's a matter of two wires being installed wrong inside the unit. Other than that - it works good well if all the manufactured parts work like they are supposed to. The only saving grace is the Holley Tech Customer Service. To have to go through all that for 1000 bucks - it's still a cheap way to upgrade a classic to EFI.