Quote:
Originally Posted by Japanjay
I think the first vs the second is with more fine tuning and bumping the boost up 2.5psi.
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It's impossible to gain that much power from just 2.5 psi and fine tuning.There are a million GTM TT kit's and dyno's out there on this forum not a single car is making 550whp on just 7 pounds of boost.