What exactly is this for?
Programmer
Fuel Injection Programmer
There is actually 3 of them on ebay right now, a little strange I think LOL. They are for the old mc500 ECU's. That is the only way you can adjust and richen the 500 ECU... I thought about maybe picking one up, but they seem to be bringing a fair amount. I hadn't seen one on ebay for like a year and now theres 3...