Hello everyone. I bought a 2017 WRX limited a little less than a month ago. The car had 2 previous owners with 18000 miles on it. The only aftermarket part on the car according to who I bought it from and from my own looking and tinkering is a mishimoto air box, but for some strange reason the car makes a very loud whooshing sound that comes from the passenger side of the engine compartment. The sound only comes on while under boost and I can't seem to find anyone else who has mentioned this sound. It sounds just like a waste gate or BOV but as if its slightly open all the time while under boost. The bypass valve on the car is stock so I'm really not sure what the sound is. Any insight is greatly appreciated.