that will be awesome upgrade if you done your GDB engine conversion(running avcs). also SSI header made in Taiwan same factory as Tomei headers, so good quality!
took 3 days to fix front turning clunking noise, replaced both cv, steering rack, lower arm bushes, at the end its lower arms bush bolt was loose......speechless!
not sure Link G1/G2, G4 i got before was using factory solenoid, my frd v6 was having similar problem before, at the end it's bronze fuel solenoid in that picture didn't hook up properly, may be double check for that.
Just check my car, that hose has been blocked off, should go to turbo actuator and turbo outlet port with T fitting, another hose on the solenoid (straight hose) go to intake manifold.