I did that on my Ford F-150 with it's huge rear end, but to me the issue with the Lexus is traffic coming for the sides and those relatively big rear pillars that obscure so much. Also, don't the rear camera kits require you to get into the headliner to do a nice install job?This is an obvious one, but if you don't have a rearview camera, get one. There are threads on here on now to install one or you can get a place like BestBuy to install it.