[Mr.2.g0]

^^could be the HPFP. You'll hear it under throttle while you're cruising on the highway typically. Not a big deal. Could be a belt, they're squeal/chirp. Whats the mileage on your car and when do you hear it? at idle, under throtttle, cruising, when its hot or cold?

 

[Mr.2.g0]

Do you notice it at all while you're driving? or even if you rev it while sitting still? if you do and it seems to increase relative to speed it sounds like it could be a belt and/or pulley making noise.

 

[Mr.2.g0]

Thats odd but I'm leaning toward something like a belt noise. Hopefully its not anything major.