Do you have a 2000 to 2004 S2000? If so, and if you autocross, track, or drive your car very aggressively, check your front upper control arm mounts. They are known to separate from the unit body under repeated hard cornering. Honda recognized this weakness in a 2004 Service News article.
We have a customer in today with his track car to have his fixed. Check yours, it is not worth risking a front suspension failure!