It can be done. A small plastic strip need to be epoxied on the inside sides so the "winglets" of the Roush kit can bolt to. Body shop I went to lied to me saying they can do it on my base bumper, so I had to order a premium bumper, get it painted and then have the Roush valence mounted. After re-doing their shortcuts of gaps, missing bolts - discovering that plastic strip is the only difference between base & premium bumpers, made me sick knowing I wasted all that $.