Actually the members on this forum that have given you very sound advice from the question you posted are far from that. The answers you are looking for have already been answered. What you need to do now is learn a bit about the Z's exhaust system, read over the great advice given here and thank someone that you feel gave you the the tip for helping you get the exhaust sound you are wanting. HFC's, test pipes and shorty tail pipes have all been suggested. It's time for you to say thank you and make up your mind. Thank YOU!

Well put . Thank you

You are going to ask us for help at the same time insult us? You are the one who doesnt know anything about the car.. Go look in the mirror and ask who is retarded.

you say right here that you want to leave the car stock, retard.....

:facepalm: look into AAM shorttails or fast intentions HFCs or TPs

I'm surprised people on this forum are nice enough to keep suggesting solutions to you after a comment like that. Almost every mod has been touched on in this thread and you're still not satisfied...I know it might seem like engines run on magic but they dont...They run on mechanics, look at the mechanics and you'll understand to get the results you desire you will have to change/mod something. Period.

Just take the muffler off.. Sounds perfect. If you like it,you can run straight pipes from where you took the muffler off, out the back, or leave it like it is.. Sounds great, better gas mileage, drop about 50lbs all for free..

i cut off the rasonator. it should be better with HFC

Will it pass smog?

I'm sure.. still have the cats on..

I think the main point people are saying to you is, if you change something it is no longer called "stock", regardless of what it is...

I guess our view on stock is different . If I take out the resonator or changes the cats I still consider it stock . But if I change the whole system then is no longer stock

Stock is just that. All stock parts with no replacements or deletions other than replacing worn items and that would be with like item and same sizes. Change a light bulb to HID or wider tire size is still a modded car. Change the sound of your Nismo, IMO that too would be modded. This really comes into play in competitive racing and show cars alot. They have certain criteria about how many and what type (if any) minor mods will take you out of a stock class.

Changing the STOCK cats to AFTERMARKET HFC or TP is still called STOCK?? Well, this is just beyond me...

From what I hear,(no pun inteaded) if you add HFC's w/ a Nismo Exhaust = wrasp.