as with anything, I'd take this with a grain of salt as it's comparing everything from cars with stock exhaust/cats to cars with full exhaust/no cats, catbacks, etc. I can only assume based on the variances in modifications on the cars, that there were also different dynos used as well (Even if they're all on dynojets, were they all on the same dynojet? I've seen numbers vary as much as 10hp on the same day between two different dynojets on the same car)
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