i have a 6th gen with teins, this could possibly be the problem.

Open up the hood and see where the the tops of the coilovers are. push down on the car and see if the tip of the coilovers move. If while you push down and the coilovers are exposed more, then they forgot to install something. Kinda hard to explain

When i had mine installed, they forgot to install something from my stock parts, so that the coilovers weren't catching on anything...just going up until they hit my hood and going up through the backseat

i drove home from the shop and was hearing a clunking noise, as soon as i pulled into my driveway opened up the hood to see what was wrong and saw this



then in the backseat




since they forgot to install something, when I would hit a bump, the car would move down, but the coilover tip (wasn't catching on to something) would go up into the hood, giving the spring leverage to compress. Boy was i pissed...there wasn't too much damage in the hood (didn't come through the top or anything)