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  1. Maintenance, service, and repair
    I have a 2011 wrx and for maybe a month at least, I've noticed a whining/whirring while I'm driving. It sounds weird but it sounds like a cheap dollar store supercharger whine and it gets higher pitched/louder when accelerating and the opposite while decelerating. It also seems to be loudest at...
  2. General Maintenance, Troubleshooting & Accidents.
    So I'm not exactly sure whats going on but on my brothers and my friends wrx they are both making a loud whining noise when boosting. It almost sounds like its supercharged its weird, but basically, both of them put a Blow off valve on and then this started happening, except for on my brothers...
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