My Dealer also left the spacers in and did not put on the front valances for the splitter. I showed the service dept this (Service Information 2012 Chevrolet Camaro | Camaro (VIN F) Service Manual | Document ID: 2756086). He said that it came on the 2012 not the 2013. Talked to GM customer serv., they say 2013 ZL1 did not come with them. Been a week and a half with no results, still taking not no for an answer!