My advice would be, "Take what everyone says with a grain of salt." The vehicle doesn't have to be completely realistic. Personally, i think that's one of the best things about your ideas/models....the way you use your imagination. With the piping on, it reminds me of something out of a Mad Max, post-apocalypse movie. It's more extreme (the point of the challenge) than just another SUV with some rollbars and lights. My .02.