Ebay Tuning Unit

Anyone think this works or not? Or tried etc? Comments?

I think that the consensus was that they do work , but aren't as good as a custom remap.

They are "quick and dirty" and work simply by fooling the ECU into pumping more fuel into the engine. They do work, but expect a lot more soot out of the back and the check-engine light to maybe pop on because the ECU is confused

Chris