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Originally Posted by m3less
That's fast development. Piggyback?
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Based on this, I am going to conclude it is a piggyback:
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Unlike other "piggyback" solutions, these use high quality connections, wires, and casing that are designed to be engine mounted for longevity to the elements.
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'Unlike other "piggyback" solutions', implying that this is also a piggyback. And looking at the other details, it looks like it plugs inbetween the ECU and the sensors, modifying the sensor input to fool the ECU, which is, by definition, a piggyback.
And this clinches it, yes, it is a piggyback, for better or worse:
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Altering sensors related to fuel, timing, and boost
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