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Yes, all Galant VR4's came with 4ws but some choose to delete it. I think it's good for daily around town driving but at high speed or when you push the car really hard it can be unpredictable. Since our cars are 18 years old many of them have developed rusted or leaking lines for the rear rack. So lots of guys block off the lines, others delete the whole system. Most racers you find will also more than likely have deleted it as well.
We (Revolution Motorsport) specialize in 4g63's, as do several other places. RRE, PINA Motorsports, English Racing, Extreme PSI, DSG, MAPerformance, etc. are all shops that have extensive knowledge of this platform.
We carry an intake pipe from ETS that is specifically made for the GVR4. It's one of the only ones I know about. Feel free to PM me or call the shop @ 541-514-9539 for more info on that or any other parts.
Stock fuel pressure is 37psi. This should be checked with the car warmed up and idling, with the vacuum line REMOVED. 43.5psi if the base fuel pressure for 2G Eclipse GST/GSX. Your fuel pressure regulator should have a 1:1 rising rate. That means for every PSI of boost, you also get one more PSI of fuel pressure. IE: With a base fuel pressure of 37psi, @ 10psi of boost the fuel pressure should be 47psi.
Hope this helps!