The Holley Sniper 2 EFI External Fuel Pressure Regulator kit brings self-tuning fuel injection to common four-barrel, 4150-flange carbureted engines. This black-finish master kit pairs the Sniper 2 throttle body with a 3.5 in. color LCD handheld display and includes an external, adjustable fuel pressure regulator with fittings and hose.
Key Features:
- Includes an external, adjustable fuel pressure regulator, fittings, and hose as the fuel system component
- Redesigned throttle shaft and plate geometry for a smoother, more linear throttle feel
- Improve your ride with the benefits of Sniper 2, including smoother throttle feel and improved RF interference resistance
- Available with fuel system kits that include an adjustable external regulator, fittings, and a 3 ft. section of fuel hose for easy engine-bay regulator mounting
- Next-generation ECU with improved RF noise and interference resistance for reliable operation on older vehicle wiring
- Cast-in fuel crossover from the primary to secondary fuel rail
- Onboard contactless magnetic TPS sensor for accurate, drift-free throttle position readings
- "Hidden Harness" wiring exits from the rear of the throttle body for a clean installation
- 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: Yes
- Fuel System: Master kit
- 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: 550-511-3AE
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.
What does the fuel system include?
An external, adjustable fuel pressure regulator, fittings, and a section of fuel hose for engine-bay mounting.
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.