What the mounting document gives you
The mounting details sheet for the dual connector Elite ECUs lays out the measurements you need for the physical install: the case footprint and where the mounting points sit. It works as a template. Print it, check it at full scale, and use it to mark your holes before the ECU ever goes near the car.
You'll find Haltech manuals and install documents in our ECU manuals section. If you can't see the one for your ECU, ask us and we'll send it over with advice for your build.
Picking a spot
- Inside the cabin is our first choice when the loom allows it. It's cooler, drier and better protected than the engine bay.
- Leave room for the plugs. Both connectors need clearance to plug in straight and to unplug later, plus space for the loom to bend without strain.
- Think about the USB port. You'll be plugging a laptop in to tune, so make it reachable.
- Keep it away from heat and ignition noise, and mount it so water can't run down the loom into the connectors.
Plan the loom first
Decide where the ECU goes before you build or order a harness. Moving it later usually means lengthening wires, and that's where problems start.
Running a single-plug Elite instead? See the single connector mounting guide. For the Elite range, browse Elite ECUs.
