I can't afford headers, exhaust, test pipes or cats right now, but test pipes are a possible mod. I just listened to a G35 with stock exhaust and helix test pipes and it sounded great. so what do you guys think about them? also, i was throwing around the idea of Ultimate Racing or Megan. i am unsure about the quality of these three, let me know what you think. More importantly, is it worth getting test pipes because of emissions? why do so many people have them if they are not smog legal? The last thing I want to do is pay $ for something that i will take off because of laws. thanks for your feedback.