I'll put is this way. Based on my own personal tests it does work to a point. Only at WOT. The computer will detune it to a point because it has it running too rich at times. And if you add a Jet Stage 2 , ADS Module, HPP3 93 setting, Superchips 93 Octane setting you will have wasted money. The odds are you will do something like this. What it does is in the program allready on these units, it cant add anymore, the computer has limits and these programmers and such are set for the limits.