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Resurrecting this thread - everything about this product makes me cringe, but I still kinda want it. It seems pretty clear that this thing DOES make some kinda difference, at least in the short term. But what I’m most concerned about is the ECU “learning around it”. What’s the verdict on that? Does the ECU just adjust to it and negate any improvements after a little bit of time? Or do the results stay consistent?
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