At Green Mountain Gear-Heads, engine management is more than wiring—it’s the control system that unlocks your build’s full potential. Whether you’re tuning a carbureted street machine or a modern EFI setup, we deliver complete EMS solutions built for performance. With in-house expertise in Holley EFI and Emtron, we engineer and calibrate systems that support everything from reliable street driving to advanced motorsport control, data logging, and power delivery.
When your build demands more than what off-the-shelf systems can handle, we turn to Emtron. Designed for professional motorsport use, Emtron ECUs offer blazing-fast processing speeds, native GPS support, multi-channel lambda control, torque modeling, traction control, and complete integration with digital dashes like MoTeC, Emtron KV, and Haltech IC-7.
Green Mountain Gear-Heads is one of the few Emtron-equipped and Emtron-literate shops in North America. That means when you need custom code written for a specific function, or want your ECU to drive your display logic, we don’t guess—we engineer it.
Holley EFI is the go-to platform for hot rodders, street machine builders, and pro touring enthusiasts alike. With broad support for common engine platforms—LS, small-block Chevy, big-block Ford, Mopar Gen III HEMI—Holley’s Dominator and HP ECUs offer reliable spark and fuel control, nitrous management, boost control, traction strategies, and integrated CAN-compatible accessories.
Whether you’re doing a street swap or drag setup, Holley gives you predictable control without overwhelming complexity. It’s the system we trust for dependable performance and solid results.
Your engine is a symphony of parts, and your engine management is the conductor. We offer fully integrated EMS packages, tailored to match the engine’s internals, cam profile, injector sizing, and power goals. This ensures stable operation, optimized drivability, and long-term reliability under all conditions.
Whether you’re wiring up an LS swap, building a boosted Ford, or ready to go all-in with Emtron, we’ll help you spec and purchase the right EMS for your goals. Need sensors, harnesses, injectors, or a dash display? We’ll help you built it.
8 AM - 5 PM
Monday - Friday
85 Shunpike Rd, Williston, VT 05495