Odd request.
Can you take a picture of your muffler? Actually a picture of the metal tag (plate) that is on the bottom passenger side?
I have a curiosity. I went and test drove a 2015 NISMO at a local dealership in STL and noticed that the stock NISMO muffler was made HKS. I got a hold of a NISMO catback from a 2010 or '11 and i believe the tag was stamped AUTECH or something else. Can't remember.
Here is a picture of my car:
https://lh5.googleusercontent.com/-P...-11-37_715.jpg