Need help ID'ing some headers

[Fightex]

Seller in Japan says they're off his NA1 but doesn't know what brand they are (he's also selling an RSR exhaust). Note that the o2 bungs are in the primaries.

To me they almost look like old DC sports minus the flex joint? Can anyone confirm?

 

[gLitch]

These look similar to my Comptech headers but the O2 bungs are on the collector and there's a Comptech plate welded on one of the primaries.

Looks like the newer DC Sports headers have a similar location for the O2 bungs as my Comptech.

https://losangeles.craigslist.org/wst/pts/d/glendale-nsx-dc-sport-headers/7435205716.html

 

[RYU]

What's the OD of the primaries?

 

[Honcho]

Those look a lot like RM Racing headers.

**EDIT**
If it's a JDM car then probably not. But if it's an Acura imported into Japan, it could be RM.