Well, as I am aware this is not a very realisted build so why not do more ? I was thinking that we could not have the inside exhaust headers just be under the roof. It would either melt off the roof or blow the body off. So............ I cut a hole in the roof to route the exhaust the out of the body. I found some plastic the shape I want ( a lighter ) and sliced that up. It looks like it will work. Keep in mind it still needs to be cut and painted. . Photos to follow.