I ordered these to replace the sandblasted brake cooler ducts on my C5Z. I only exchanged them after the return period had expired. They don't fit flush with the bodywork, there is a lot of excess plastic from the mold making them protrude, I've tried sanding the excess plastic but it still doesn't fit flush due to poorly cut edges. . My frayed original canals look better than these that don't fit properly. Don't waste time on them unless you can open the packaging right away and send them back for a replacement if they don't look right. Now they are in my box and I will most likely throw them away because I don't see the need to sell them to anyone.