Many members run a variety of TP's, HFC's, or Motordyne ART pipes alongside their FI TDX system. Of course, test pipes will give you more gains, but there is the downside of more noticeable smell and smog checks. It's really preferential, imo. They each do sound a little different, I would check out some videos on what you prefer.
Honestly, I doubt you could ever tell the difference between the power gains with TP's, especially when you've got forced induction.
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2012 Pearl White 370Z GReddy Twin Turbo
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