The pic on that site is not of an HKS Hi-Power catback for a 370Z. Might just be a representative photo. The HKS part number is correct.

So our parts manager contacted Nissan on the R-tune catback and they said it is still available to order from Nissan.

Do you know if it is the same part number or the new V2 exhaust that's a different part number?

Going on 5 years now with this exhaust installed and I love it, despite 2 issues: the initial resonator weld and then about 6 months ago the NISMO plate between the two mufflers broke a weld and was rattling, but I just removed it and now I have a cool piece of metal that says NISMO.
I chalk up these issues to just a lack of QC on the welding... it can happen. The overall system has been fantastic though.

I just found one online at a Nissan dealership and ordered it, the order went through! It wasn't there before, maybe they found one in their warehouse??

Woohoo! I'll update when it arrives, hopefully it is not the V2 mislabeled or something!

Update: nevermind, they don't really have the part in stock. Oh well.

I ordered mine directly from Nismo not the dealer.

I don't see it available anymore

https://www.nismo.co.jp/en/products/...rts/parts.html

I have an HKS Hi Power in the mail, it will be here Monday. Oh well, I would have preferred the Nismo for sure.