Eibach just released their Pro-kit lowering springs for the Chevy HHR. You can find them here http://www.nopionline.com/nopistore/dsp_parts.cfm?vpcid=591&vcatid=0010&vcatyear=2006&vmodelid=071&vmakeid=135&vL1id=0&&vtitle=CHEVROLET%20HHR%202006