You do not need all of them. As an "above-average" upgrade, you can install the front strut bar, front lower arm bar (or fender bars), rear 16mm antiroll bar, and room bar.
strengthening 4 or 5 of these critical area will make the car much like another car and it's already adequate.
Does anybody know where can i get an adapter socket to convert from VR4 ecu to EVO 3 ecu? I am using VR4 wring but i want to use EVO 3 ECU but dont want the hassle of changing every socket at the engine bay if i use EVO 3 wiring...example...