After lowering your HHR you will need to have it re-aligned.

We recommend putting 100-150 miles on the vehicle first, which allows the new springs to settle in. When it's time to have your HHR aligned, print these specs out and take them to your alignment shop - as the new 2006 vehicle data is not yet in their computers. You may also need a front camber kit and rear shim kit. Go low - stay straight - and have fun!