To buy headers or not?

Originally Posted by nasm

Great thread, and kindly allow me to ask this question:
A friend of mine, who is a tuner, said that 370z 2014+ no need for short headers, if I put test pipes, because they improved the stock one, and if you want a header go for long tube. That what he said.

Personally, I want the short ones, because it is easy to pass the registration test every year we do. However, I have read a lot about Z1 short headers, and how effective they are. So, now my question is, is it really worth it to go for short headers with test pipes I have with catback or no, it is not worth it? In other way, am I getting with z1 short headers 10+ whp or no?

Many thanks for sharing your experiences. Highly appreciated.
NAS