ok so i have a Classic STi 1995

and after driving for a bit i start to hear a "whorrrr" sound but soon as i brake its gone ? but only happens once been driving around 10-15 mins once everything is warm etc sounds to be coming from passanger side front, the sound is quite loud also.

brakes dont judder or anything pads and disks are new..

any help would be good, going to take the wheel of sometime this week to see if i can notice anything

 

When you check the front also check the back, i had a problem with squeaking front brakes and it turned out the be sticking back.

 

Im gonna run the car down to Mr Clutch as they do free brake checks so i think would be quicker and easyier if i took it to them