So as I stated before I just recently purchased a 03 a4 1.8t and when I take off I hear light knock mostly from the center of the car like underneath me and it's been raining and I have no garage so I can't really get under my car so what I know from vw's is 1.8t's are notorious for exhaust hangers do you guys think that's all it is?

 

Probably one of these guys....

 

haha I guess I'll have to send my cat in there to attempt to take care of it then lol