Holley's Sniper EFI 2300 brings self-tuning fuel injection within reach for vehicles that came factory with a 2300-flange 2-barrel carburetor, including many classic Fords, AMCs, and Mustangs, and adapts to square-flange or Q-jet 4-barrel intakes with a Mr. Gasket adapter (P/N 1933 or 1929MRG). The Master Kit pairs the throttle-body EFI unit with a complete fuel system, putting an end to cold-start issues, hesitation, vapor lock, and flooding in one bolt-on package.
Key Features:
- Bolt-on 2300-flange carburetor replacement
- Supports up to 350 HP naturally aspirated or 285 HP forced induction with (2) 100 lb/hr injectors
- Only 4 wiring connections required for installation
- Internal fuel pressure regulator
- High-resolution 3.5" full-color touchscreen display
- Simple calibration wizard — no laptop required
- Self-tuning ECU learns and adjusts without prior tuning experience
- Includes clamp-on O2 sensor kit (Bosch wideband)
- Includes 20 ft of 3/8" Earl's Vapor Guard fuel hose
- Includes fuel pump, pre- and post-fuel filters, and return bulkhead fitting
- All necessary hardware for a complete fuel system conversion included
- Free downloadable Sniper tuning software
Specifications:
- Type: Throttle-body mounted, self-tuning EFI conversion, Master Kit
- Flange: 2300 (2-barrel), adapts to square-flange/Q-jet 4bbl with separate adapter
- Max Support: 350 HP N/A, 285 HP forced induction
- Wiring: 4-wire vehicle connection
- Display: 3.5" full-color touchscreen
- Includes: Handheld/onboard monitor, 20 ft EFI fuel hose, fuel pump, pre/post fuel filters, return bulkhead, O2 sensor kit, hardware
- Finish: Shiny
- Part Number: 550-849K
Designed for at-home installation with Holley's installation manuals and online videos; recommended companion upgrades include HyperSpark ignition, air cleaners, and digital dashes for a fuller EFI conversion.
FAQ
What vehicles is the Sniper EFI 2300 Master Kit designed for?
It's built for engines that came factory with a Holley 2300 (2-barrel) flange, including many classic Fairlanes, Galaxies, Falcons, Comets, F-100s, Javelins, Rebels, Mustangs, Thunderbirds, and Cougars. It can also adapt to a square-flange or Q-jet spread-bore 4-barrel intake using a separate Mr. Gasket adapter.
What's included in the Master Kit that isn't in the base kit?
The Master Kit adds a complete fuel system: 20 ft of EFI-rated fuel hose, a high-pressure fuel pump, pre- and post-fuel filters, a return bulkhead fitting, and the hardware needed for a full fuel system conversion.
How much horsepower can this kit support?
Up to 350 HP naturally aspirated or 285 HP with forced induction, using the included (2) 100 lb/hr injectors.
Do I need a laptop to tune it?
No. The kit uses a simple calibration wizard on the touchscreen and self-tunes based on answers to a few engine questions — no laptop or prior tuning experience required.
What's the difference between this and the base Sniper EFI 550-849 kit?
The 550-849K Master Kit includes the complete fuel system (hose, pump, filters, return bulkhead, hardware); the base 550-849 kit is the throttle-body EFI unit and handheld tuner without the fuel system components.
