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Holley Sniper EFI XFLow

By: Ray Frescas08/26/2019 < Back to Blog Home

Holley’s Sniper EFI lineup covers all the bases with the introduction of Snipers EFI XFLOW! Packed with 4-120 pound injectors and 900 cfm of airflow, the Sniper XFLOW fills the void! With enough flow for 800 plus naturally aspirated horses, Sniper XFLOW delivers! Comparing the throttle body inlet to the original Sniper shows you that the XFLOW is all business. Much like its big brother the Sniper Stealth 4500, the contoured entry allows plenty of airflow.


A true bolt-on replacement for any 4-barrel carburetor, making the switch to EFI is super easy with the dual pattern mounting flange. Setup and installation is just as easy as the original Sniper EFI. The XFLOW ECU creates a basic calibration after answering a few questions on the touch screen display. The Bosch Wideband oxygen sensor provides real time fuel map learning keeping your engine happy for pure driving enjoyment.


The OEM style TPS and IAC sensors mean reliability. As with the original Sniper EFI, Sniper EFI XFLOW is able to control timing when used with a magnetic pickup distributor such as an MSD Pro Billet or a hall effect distributor like Holley’s Hyperspark Distributors. By controlling the timing you can set the Rev limiting capabilities on the touch screen display. XFLOW works with great with CD ignitions such as MSD 6 series.


By using a USB to CAN tuning cable, you can download Sniper EFI software to setup the same advanced boost control features found on Holley HP and Dominator EFI systems. After initial setup, the built-in boost control is done through the handheld touchscreen monitor allowing you to retard timing based on boost. You can even program and set target air fuel ratios per boost level! A 2.5 bar MAP sensor tells XFLOW how much boost your making and monitors up to 21.5 pounds of boost pressure. Inset: Forced induction engines will require an external bypass fuel pressure regulator that is not included.


For nitrous users, it supports wet or dry nitrous applications. Also setup through the Sniper EFI software at first, the built-in single stage progressive nitrous controller can be adjusted through the handheld touchscreen. Easily setup lean/rich AFR cutoff points. Timing retard can be rpm or timed based all adjusted from the handheld touchscreen display.


XFLOW has a total of 6 ground triggered outputs for controlling accessories. Three 0-5 volt inputs allowing you to monitor additional sensors such as fuel, oil or pressure sensors.


You also get to deck your vehicle out with all the Holley EFI gauges like the killer digital dashes or keep it classic with our plug-and-play analog-style digital gauges.


And If that’s not enough Holley offers an 8 injector Sniper EFI XFLOW for up to 1375 horsepower! So when you serious about making big power with a thottle body EFI, look for Sniper EFI XFLOW.

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