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Video: Overview of Holley’s New Sniper EFI Stealth 4150 System

LAS VEGAS, NV — The aftermarket EFI wars have heated up over the past few years. Competition has caused the sheer amount of aftermarket EFI systems to proliferate, making them more affordable than ever.

With that in mind, Holley talked up its latest EFI, the Sniper EFI Stealth system last week at the 2019 SEMA Show in Las Vegas, NV.

As the “Stealth” name indicates, this EFI system is meant to blend in, mimicking the look of your old-school carburetor.

Modeled after an Ultra HP carburetor, the Holley Sniper Stealth 4150 has four 100 lb./hr. fuel injectors, a dual-feed configuration, and supports up to 650 horsepower naturally aspirated.

From the fuel bowls to the wiring harness exiting the back of the system to stay hidden, the Sniper delivers EFI advantages while showcasing a vintage vibe.

But don’t be fooled by the basic appearance of the system.

Holley says the Sniper EFI Stealth product line (including the previously released 4500 series) is packed with plenty of modern performance features, including a high-pressure fuel crossover line, rear exist wiring for easy routing, and a timed spark port located under the front injector cover (fuel bowl).

New Holley Sniper EFI Stealth 4150 Systems finished in polished aluminum or black powdercoated come in three configurations:

For more information, you can watch the overview video at the top of this article, courtesy of our friends at Summit Racing.

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  1. I had this installed on a 69’ Elcamino . At first it was just fine and did see a significant improvement over my edelbrock 600,, and a good improvement on gas mileage.
    But now it’s acting up and every once in awhile it stumbles, like I have an engine miss,, it clears itself out but then happens again and again. All sensors are working properly when I go into sensor mode and check. What can this be??

  2. I’m no expert but I been doing a lot of research and taken some online classes you need to look at your exhaust for any leaks and install a fuel pressure gauges if anything return it for a new one they come with a year warranty

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