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boost problems

  1. General Maintenance, Troubleshooting & Accidents.
    So, I have a 02 wrx wagon with the ej205 and every time I hit boost it whistles really bad and I don't hit target boost, I've been wondering if anyone has any suggestions as to what it's is. On another note the car never holds the same boost, I can go out warm up my car and go full throttle and...
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