It would flow with the car a little better if you removed the factory one,also save you a couple pounds 
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Pioneer AVIC 8000NEX,Hertz ML 1600,ScanSpeak D3004,Audison AV 5.1K,Helix DSP.2,Illusion Audio L10 Sub,RJM Clutch pedal,Stillen G3 long tube intake,Nismo exhaust,AAM S-line axle back,Ecutek tune
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