My Audi A4 B6 1.8T is still stock. Before I bought her she sat for 2 yrs as the previous owner told me. I bought her 9 months ago and all I have done is install a forge box and a Cat and muffler delete. recently when im driving to and from work at high speed like 80-90 I hit a bump and feel like the she wobbles. not enough to scare me or make slow down. never the less I feel that she isn't steady. any suggestions of to what it can be? maybe the control arm bushings, rear suspension or something?