boxed in, means wrapped all the way around the existing frame sections, and well, any kinda connectors for the sub frames really take out a lot of flex in the car along with the strut tower brace 
but i reccommend steeda products too and they are willing to flex their prices if u call them and ask them to just as a heads up :bigthumbsup steeda really does make quality products for mustangs
but i reccommend steeda products too and they are willing to flex their prices if u call them and ask them to just as a heads up :bigthumbsup steeda really does make quality products for mustangs
