Originally Posted by TPrelude-370z

Hey guys,

Before giving me crap about searching, hear me out. I have researched and mostly you just run into arguments on threads. Basically I have test pipes and custom exhaust, stillen intakes, and UPREV tuned. I failed IL emissions because the Cat readiness codes give them the "not supported" instead of ready. I believe uprev did leave me with a stock tune but I do not remember which map it was for sure. Not to bash them but UPREV has very poor customer service. You cannot get them on the phone ever and they do not respond to emails either. I need some guidance please. Thanks