I hate to be the nay-sayer but I don't think this is going to be a performance improvement, only cosmetic. It may even hinder performance compared to the OEM ZL1 1LE wing.
GM already went ludicrous-mode on the ZL1 1LE, including its wing. If the ZR1's wing was going to improve performance I sure they would have used it.
I'd bet the ZL1 1LE's wing is the exact balance of downforce and drag to reach optimal lap times.
My guess would be that the ZR1 wing is going to hurt lap times and certainly hurt 0-60 and 1/4 mile times if you're into that.
Having said all that -- there's nothing wrong with modding purely for cosmetic reasons
Just putting it out there.