Can anyone identify these extractors?

[shamus]

Does a photo of the collectors help? Or are they all pretty much the same?

 

[lmoengnr]

Does a photo of the collectors help? Or are they all pretty much the same?View attachment 235072

Looks similar to Sureflo headers, but Sureflo has a standard bunghole for the O2 sensor mount, not a long standoff mount like these headers.
Have you tried comparing these to pics of X-Force 4-1 headers?

 

[shamus]

Yeah, photos of the x force headers have the front pipe going behind the other pipes.

 

[Shen Long]

Yeah, photos of the x force headers have the front pipe going behind the other pipes.

Empire header???

 

[shamus]

Empire header???

Yeah, pretty sure they’re these.
https://empireperformance.com.au/pr...s-ls2-ls3-l98-l76-l77-headers-extractors-cats