Apexi AVC-R, I have the original box and instruction manual with it. I also EXTENDED the main harness by at leats 3-4 feet, this was a pain in the ***, there were about 10-14 wires I had to extended, I soldered all of them and use a shrink tubing to seal it. You can mount the display unit anywhere. I had mine on top of the rear view mirror.
I only used it less than a month or so, I have EMS, I am gonna go the cheap route and use GM boost control solenoid.
$ 375 shipped