Upon starting up today I noticed a quiet high pitched howl coming from the bay.
It didn't start immediately.. It was about 30 seconds after it reached idle.
My current mods are Carbonio Cai, Usp catless downpipe, stage 2 Giac flash, upgraded piston DV & the car is DSG.
Any ideas what it may be? I'm gonna stop in my shop tomorrow morning to get an idea. If it's serious then I guess I'll swap out the downpipe and flash the stock software.
Thanks in advance.