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Welcome!
In terms of the exhaust system, anything other than a header is not going to give you a power increase. It's only going to change the sound of your car. So the questions become: how loud do you want your car to sound?, what other plans do you have for your exhaust in the future? (this helps determine what axle-back you may get), and what is your budget?
Nameless has great quality exhaust options, as does Perrin. I believe Perrin is a little quieter than Nameless so perhaps it's a better option for DD? Also, why the 3" Perrin? Do you want to go FI in the future?
Personally, I went for something cheap and loud: the Nameless track pipe.
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