Hi there guys! Heres the run down.
>Driving down the road
>Do a little bit of a pull to pass someone.
>Nothing harsh, just passing
>Start hearing a grinding noise
>Slow down and the noise slows down.
>Thinking its something extremely expensive i think...
>"Oh crap"
>Get home. Havent driven it since.

Looked underneath and i cant see anything obviously wrong. This happened literally half an hour ago.

WHATS WRONG?!