from Ford, forgot which part # or from which which car. It's sitting in my spare parts bin. 1 solenoid works for both turbos. You don't need a Haltech trim module. I bought a $2 potentiometer from Radioshak, does the same job.
I ran that setup for awhile and got tired of it. Installed a Profec B spec 2 instead. Never looked back. The profec B (or any boost controller) is alot easier to tune/change and don't need a laptop.
I've got a lot of other things to worry about with the Haltech. An electronic boost control does the same or better job. No need to over-complicate things.
