Originally Posted by B8
The question is not really at what power do I need a 3 inch exhaust but rather at what point and what level/measurement is back preasure detremental to my car.
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think it needed to be put in laymans terms
As varied as it is, what bracket of 'measurments' would an RST have to reach to need a 3" bore and what would that equate to roughly in power terms do you think?