Honestly I would wait for someone to chime in that has personally dealt with multiple options. I do not believe that resonated test pipes are much different than regular test pipes AT ALL but I do not personally know. It sounds like ART Pipes are what you want though.
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2007 350Z HR :: 3.7 Final Drive : Injen Long-Tube Intakes : TurboXS Cat-Back : Eibach Sportline : Enkei RPF1 18x9.5/10.5 +15
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