[jamesc1123]

I actually called him, because the site doesn't have a "buy" option for the Camaro, so when I ordered it online, I ordered the "L" shaped one for the SN 95 Mustang and in the comments I mentioned that it was for a 2010 Camaro. I'm pretty sure it's 8 inches. Best bet is to call or email him, so he knows exactly who you are, and when the order goes in he knows what car its going on and you get the right kit. He responded to my email within 10 minutes in the middle of the day whenever I sent it.
If you do the other style (flat, not L shaped) it will be really close to one of the horizontal crossbars on the lower grill. If necessary then, you can remedy that by drilling the holes and adding washers or welding a spacer plate.