How are you seeing you are losing power?
Probably your manifold, if I recall, you didn't have that before when you originally got tuned. I remember reading some people lost power with those manis.
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2010 Magnetic Black Metallic 370Z 6M
stillen gen 3 CAI - topspeed test pipes - invidia gemini CBE - UpRev tune
301whp (HP Logic Mustang Dyno)
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