Fuel rail 2.0.  Ben made it with smaller o-ring bores for better fitting and sealing.
**EDIT**  Don't cap the line in blue, l
    Fuel rail 2.0.  Ben made it with smaller o-ring bores for better fitting and sealing.
**EDIT**  Don't cap the line in blue, like I did here.  You need it to help atomize side-feed injectors.