The Holley Sniper 2 EFI Base Kit brings self-tuning fuel injection to common four-barrel, 4150-flange carbureted engines. This black-finish base kit pairs the Sniper 2 throttle body with a 3.5 in. color LCD handheld display; a fuel system is not included, letting owners reuse a compatible existing fuel supply.
Key Features:
- Supports up to 650 hp naturally aspirated or 575 hp under boost with four 100 lb/hr injectors
- "Hidden Harness" wiring exits from the rear of the throttle body for a clean installation
- Compatible with the full Sniper EFI Ecosystem, including HyperSpark ignition, fuel systems, and multiple display options
- Redesigned throttle shaft and plate geometry for a smoother, more linear throttle feel
- Next-generation ECU with improved RF noise and interference resistance for reliable operation on older vehicle wiring
- Onboard contactless magnetic TPS sensor for accurate, drift-free throttle position readings
- Cast-in fuel crossover from the primary to secondary fuel rail
- Only four wiring connections required: Battery+, Battery-, Switched Ignition, and RPM
- Calibration wizard builds a base fuel map from a few simple engine questions - no laptop required
- Each throttle body is individually serialized for streamlined customer service and warranty support
Specifications:
- Flange Style: 4150
- CFM: 800
- Fuel Pressure: 58.5 PSI
- Fuel Pressure Regulator: No
- Fuel System: Not included
- Injector Size: 100 lb/hr @ 58.5 PSI
- Inlet/Outlet Size: 9/16-18 Female O-Ring (AN 6)
- MAP Sensor: 2 Bar
- Max Horsepower Rating: 650 naturally aspirated / 575 boosted
- Finish: Black
- User Interface: 3.5 in. Handheld
- Power Distribution Module: No
- Transmission Compatibility: All
- Part Number: 550-511-3AX
Nitrous control is not supported in Sniper 2 EFI software.
FAQ
What engine and carburetor flange does this kit fit?
It's designed for common four-barrel, 4150-flange carbureted engines and supports up to 650 hp naturally aspirated or 575 hp under boost with the included four 100 lb/hr injectors.
Does this base kit include a fuel system?
No, a fuel system is not included, so it's a good fit for vehicles that already have a compatible fuel supply in place.
Do I need a laptop to tune it?
No. The 3.5 in. handheld's calibration wizard asks a few simple questions and builds a base fuel map automatically.
Does this kit include the Power Distribution Module?
No, this version is sold without the PDM.
Is nitrous control supported?
No, nitrous control is not supported in Sniper 2 EFI software.
