Shouldn't you be looking for thr PR4052?

The PR124 is the aftermarket for the 280Z 74-77.

Both are 2.5bar spec.

 

Looks like Herko uses different part numbers than Standard.  The 4052 is the same as the PR 1 3 4.

 

No offense intended to anyone but people seem to be responding without actually opening the first Rockauto link.  It's making the conversation a bit confusing.  The part numbers are there for both Beck Arnley and Standard.  And the original question was about 78-83 FPR's, even though tool_man has a 77.  I assume that he swapped rails for a later model. 

It's an interesting topic but we seem to be repeating ourselves.  No offense!!!!

https://www.rockauto.com/en/catalog/volkswagen,1978,super+beetle,1.6l+h4,1423178,fuel+&+air,fuel+injection+pressure+regulator,6124

https://www.rockauto.com/en/moreinfo.php?pk=482565&cc=1423178&pt=6124

https://www.rockauto.com/en/moreinfo.php?pk=46974&cc=1423178&pt=6124&jsn=11

17 hours ago, Zed Head said:

Looks like Herko uses different part numbers than Standard.  The 4052 is the same as the PR 1 3 4.

 

No offense intended to anyone but people seem to be responding without actually opening the first Rockauto link.  It's making the conversation a bit confusing.  The part numbers are there for both Beck Arnley and Standard.  And the original question was about 78-83 FPR's, even though tool_man has a 77.  I assume that he swapped rails for a later model. 

It's an interesting topic but we seem to be repeating ourselves.  No offense!!!!

https://www.rockauto.com/en/catalog/volkswagen,1978,super+beetle,1.6l+h4,1423178,fuel+&+air,fuel+injection+pressure+regulator,6124

https://www.rockauto.com/en/moreinfo.php?pk=482565&cc=1423178&pt=6124

https://www.rockauto.com/en/moreinfo.php?pk=46974&cc=1423178&pt=6124&jsn=11

I haven't swapped rails yet.  @Patcon and I are working through EFI and other diagnoses of the stock system at the moment.  But I do plan to switch to an aluminum rail at some point, at which time the later style FPR would be desirable.  Having not found any recent discussion on the subject, it seemed like a good time to ask for ideas.  Lots of good ones here.

@the_tool_manI have a relatively new Bosch FPR mated up to my 78 fuel rail with rebuilt injectors if you’re interested. The run time is less than 10 hours. Brought my car back to factory specs and decided to go a different route. The system was removed when I sent the engine to Datsun Spirit. If your interested send me a PM.