It was also pointed out to me at least that the headers if paired with hfc rather than test pipes would max at 324 hp. So on in my instance is why going test pipes in conjunction.
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2009 370z Touring 7AT/AAM 2.5 true dual exhaust/AAM DE test pipes/z1 vqde35 headers/AAM cold air intake (R-line)/Motordyne M370/Quaife LSD/z1 brake upgd pkg/Swift Spec-R springs/WhiteLine Front&Rear sway bars with endlinks
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