RB, Maxim Works, Hytech header pics
 

Had all three headers at my shop. Here is a quick side by side photo comparison:

https://photos.app.goo.gl/dTgTwNrMyHlgGjku2
Sorry I can't hotlink from google photos.

The racing beat collector is sort of crap. I think you could probably get a better header for less buying a OBX or ebay header and then modding it with a PLM collector.

I would like to give you dollars for the Hytech.

I'll give you dollars+1 for the Hytech

The collector on my RB looks different.
https://cimg1.ibsrv.net/gimg/www.mia...8afeb4cb6c.jpg

I looked at other RB headers and all look like mine. I think your copy is a repaired unit.

Also I noticed that the bend after the collector on yours is sharper than all the other RBs I have seen. I would be willing to bet that the O@ bung is also not in the right place. It looks like the only part original to yours is the main flange, the primary tubes and the final flange.

Presumably the middle one is RB?

That is how I took it. But there is so many small differences than all the RBs I have seen. I have the first 4-1 version without the dent. All the others I have seen with the dent has the same collector as mine and has the O2 bung lower like mine.