do S5 pulsation dampers cause fuel leakage as well?

i can only find write ups on the banjo bolt mod for S4's. and it seems like the S5 primary rail is only one piece

 

the rail is only one piece. it can leak, but its really really rare

 

It is one piece, but the diaphragm can still tear just like the S4's and it can leak through the hole where the little rubber thingy sticks out. If it's never been done, replace the fuel rail, it's not THAT much more than the pulation damper alone for the S4.