[WACR]

After quite a break from working on my car, I am now back into it. I know there have been several threads regarding the fuel pressure regulator set up for the LS1 which now runs a single feed line to the fuel rails as standard. Am I correct in thinking that this little device shown between the two fuel rails is a standard regulator? The workshop manual I have says it is. If so, I am confused since I have read some postings which indicate the standard LS1 setup has a in-tank fuel pump / regulator, not sure what this little thing is doing on the fuel rail then.
Do I need an after market regulator then?
If anyone can shed any light on this it would really help.

Cheers

Richard