no need for one unless you compete. Unless you plan on making it a track only car, and have only bucket seats and harnesses (bucket seats meaning fixed position not JDM itr recaros) you can get one. If not its just for show and is stupid. Matt, Nick, Ricky, Jake and all the other track sluts here track our cars religiously and dont use roll cages. Matt and I are thinking about doing a roll bar just to comply with competition regulations and be streetable. If you dont need it then dont get it is my suggestion on the X bar and the roll cage, unless you intend the car to be a show car or a race car theres really no need IMHO