better if with a tune
hi i have a 370z 40th anniversary with stillen headers, typhoon intake and cnt cat back. the uprev tune made a huge difference ,the car respond better you deffinetly see the difference in power. before the tune it gave around 276whp with the mods in a mustang dyno and after the tune a 296.4whp on 91oct and a 300whp on 104ct
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