Picked up this '09 with only 6400 miles at a Ford dealership south of Indy last month. On the way home I heard the dreaded clunk when I hit bumps. The dealership was kind enough to have put a 4 mo/4k mile warranty on the car, so I took it in. They replaced the rear sway bar links & bushings, but couldn't test drive it because it was raining. (I'd asked them not to) On the way home it still clunked, so back it went. The car has Borla cat-back exhaust, & Eibach springs. Turns out on bumps the axle was hitting the pipes on both sides. The car was sitting a little too low for my taste anyhow, so I bought FRPP M-5300-L springs to raise it back up a little. They installed them at no charge. They had to "adjust" the pipes a little, but pronounced it ready today. I'll pick it up tomorrow & hopefully hear no clunk.