Whether you’re running a street car, strip monster, or all-out race machine, Holley EFI is one of the most powerful ways to unleash horsepower and reliability. At Green Mountain Gear-Heads, we specialize in configuring, installing, and tuning Holley EFI systems for Chevy, Ford, and Mopar platforms. From Sniper plug-and-play kits to Dominator systems with advanced custom mapping, we deliver calibration work that transforms how your engine performs.
Plug-and-play is only the start. We build custom systems tailored to your engine’s exact combo. Whether you’re running a naturally aspirated LS swap, a boosted Coyote, or a Mopar big block on E85, our Holley EFI tuning process fine-tunes:
We’re dedicated to building reliable power to help you meet your goals.
If you’re swapping from a carburetor, we’ll ensure your fuel system and ignition are properly upgraded for modern EFI demands.
Whether you’re planning a new build or converting an existing engine, Holley EFI can take your ride to the next level. Let Green Mountain Gear-Heads handle the wiring, tuning, and calibration—so you can focus on driving.
Green Mountain Gear-Heads primary focus is on domestics, but can sometimes support non domestic builds.
8 AM - 5 PM
Monday - Friday
85 Shunpike Rd, Williston, VT 05495