Originally Posted by Rahul718

I believe it is, but I'm looking for some sound. Test pipes would be too raspy (I had a similar setup on my old 350z) and HFCs might be too quiet for the sound I'm looking for

Edit: I think you might be talking about the Nismo S-tune exhaust, which actually had proven HP gains over the regular 370z exhaust. The exhaust that comes with the Nismo is not the S-tune and I'm not even sure it's any more free flowing than a regular 370z exhaust