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Ok... so I have my 2012wrx on order which will be at least a month if not getting here. In the meantime... I have read the sticky mod thread but its rather old. Im curious about which mods are best bang for the buck. I've used an ap in one of the my evos and my ms3. I've read that the ic can be a weak issue with higher boost. My question is basically what ares of the car are most restrictive? Like is a caisson really needed or will a good works or perrin drop in do just as well? Other areas? I do plan on sway bars and brake pad and fluid changes.