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A normal production ESS VT2 on premium pump 91 is rated at 575chp or ~38.8% more hp than stock (414chp). This car made 330whp STD stock and now makes 471 whp STD which is 42.7% more than stock. Different cars and different dynos read as we all know different, but as long as the delta gain on the same dyno is correct that is all that matters. ESS does not advertise a kit stronger than 600chp (6.5PSI on 93 octane) for the E9x M3 (44.9% more than stock), but as we have all seen many cars do make considerably more with this kit depending on factors like fuel/ambient conditions/stock power level/supporting mods etc. One should however not expect more than rated gains.
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