Late last summer I had J&M upper (non-adj) and lower control arms (extreme) installed along with QA1 single adjustable rear shocks. They made a real improvement in traction however the NVH, if you want to call it that, is pretty bad. It is not road noise but more like "clunking". I took it back and was told it is "normal". I need to figure out if it is normal because I really don't like it. If I need to make chnages I will make changes but don't want a repeat. Anyone else have these parts on their GT500's (mine is an '08)?