So today while driving around a cul-se-sac I heard a screech/ whine..it's not constant but sounds like it is coming from my front left wheel...It happens at 10-15 mph aswell...

Any ideas?

Also, when I start my car, there is a crackling noise for about 10 seconds from under the car right after the cats in the exhaust..
I just put on my Vibrant exhaust a few weeks ago..
Could the new exhaust be related?

And last but not least...
The car seems to shake a bit when I turn it off and it was not doing this before..
Anyone else with this problem?