[brzaapi]

Did you throw any loctite on the nuts that attach the camber plates(tophat) to the strut tower assembly of the car( fronts have 3, rear have 2). Most coilovers you only use between 15 to 25 ft/lbs when tightening these nuts down. And, while your car sits on the ground you likely wont notice if they become loose.

And as you hit bumpy pavement, you will hear a metal on metal popping sound. In other words, the top of your coilover is floating and not tight. So, if you didnt apply some loctite to each of the those nuts, they can easily loosen up and cause your exact symptoms. Just a thought, and very easy to check and fix.

And make sure you have the nuts torqued to spec.

Good luck.