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I added a racechip piggy back and its even more amazing. The pull thru gears feels magic. Supposedly the car has 750hp at the engine with this $600 piggy back. I don't doubt it the way it feels but I haven't dyno'd the car.
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Can you elaborate more on this? Curious as to how a piggyback tune (vs. bench tune or custom map) could add
+150hp?