I installed one of these on my base C6 before storage. For the price I knew I was taking a risk but im happy I did. Quality is fantastic, uses the factory holes holing the stock spoiler so no drilling is required. I put some 3m tap on the ends so it would fit snug. Comes unpainted but I like the flat black look so I put it on as is. Easy to take off and have painted later if I wish. I will note if you have large arms you will need to borrow a lesser man or your wife to loosen/tighten the hardware as mine didn't fit through the tail light openings.
Amazon product ASIN B0784PV2SH
Amazon product ASIN B0784PV2SH
