So last Sunday I gutted my uppipe on my 2002 WRX with 107k. I got a chance to actually drive it yesterday and get up into boost and noticed a high pitched almost scream sound around 3200 rpm that actually drowns out engine noise. I am thinking it is the turbo since i only noticed it under boost but it seems really loud. It seems to drive fine and holds boost but this is my first car and first real mod. Let me know what you guys think. Thanks for any input.
The video below is first a walk around of the car in case anything sounds abnormal there, then a 1st - 4th gear pull up a hill to 45 mph.