Holley Sniper HO550-541 EFI XFLOW 900CFM Fuel Injection System

Holley Sniper EFI XFLOW fuel injection systems are packed with four 120 lbs.-hr. injectors and 900 cfm of airflow.

These EFI systems deliver enough airflow for 800 plus naturally-aspirated horsepower, and work great with CD ignitions. They feature contoured entry corridors for maximum breathing potential, and the dual-pattern mounting flange makes these true bolt-on replacements for any 4-barrel carburetor. When you're serious about making big power with a throttle-body EFI, order Holley Sniper EFI XFLOW fuel injection systems.

Some of the many features, items, and specs include:

• 2.5 bar MAP sensor
• Dual-pattern mounting flange is designed to fit 4150 flange and spread-bore manifolds
• Sniper XFLOW ECU is throttle-body mounted and creates a basic calibration after you answer a few questions on the touchscreen display
• Bosch wideband O2 sensor provides real-time fuel map learning for pure driving enjoyment
• OEM-style TPS and IAC sensors for reliability
• XFLOW ECU can control timing when used with magnetic pickup distributor for rev limiting capabilities
• USB to CAN tuning cable allows download of Sniper EFI software for advanced boost control features
• XFLOW supports wet or dry nitrous applications
• Six ground-triggered outputs for controlling accessories
• Three 0 to 5 V outputs for monitoring additional sensors (fuel, oil, pressure, etc…)
• Compatible with Holley EFI gauges

• Self Tuning:Yes
• User Tunable:Yes
• Maximum Horsepower with Gas:800
• Timing Control Compatible:No
• EGR:No
• Transmission Controller Included:No
• Injection Style:Throttle body
• Metering Style:Speed density
• Power Adder Compatible:Yes
• Intake Manifold Included:No
• Fuel Rails Included:No
• Throttle Body Included:Yes
• Throttle Body Mounting Flange:4-barrel spread bore
• Venturi Quantity:4
• Throttle Body Material:Aluminum
• Throttle Body Finish:Black ceramic
• Injectors Included:Yes
• Injector Size (lbs/hr):120 lbs./hr.
• Calibration Module Included:No
• ECM Included:Yes
• Wiring Harness Included:Yes
• Oxygen Sensor Included:Yes
• Fuel Pump Included:No
• Fuel Pressure Regulator Included:No
• Distributor Included:No
• MAP Sensor Included:Yes
• IAT Sensor Included:Yes
• TPS Sensor Included:Yes
• IAC Motor Included:Yes
• Quantity:Sold as a kit.
• Notes:An external fuel pressure regulator is required.