Apexi AVC-D Boost controller
 

This was the predecessor of the AVR. It looks like the original SAFC with the 5 knobs on it. It has boost settings for 3000, 5000, and 7000 rpms. It also has a speed boost setting and, with an external push button, it has scramble boost (basically a boost setting that only lasts for how many seconds you program it for). It's a neat little unit. It's no frills to it and pretty easy to hook up and run. The adjustments glow light green until you are at that rpm setting and then they fade over to red. I have the controller and solenoid and wiring harness. I believe I have the instruction manual on file in my computer as well.

$75