So I'll let everyone know about the exhaust from nismo.
I was able to get my hand on a used one with +\- 1 year
And i love it but there is no sound increase or change. This one or your stock one sound just about the same.
Here is some picture of when i get it and how it look now. I will remove it in spring and clean it very well
Im planning of removing the resonator just like the catback from nismo to make this thing louder.
I'll let you know how it sound