:stickpokeI have been trying to find out why people need to change the subframe of the brutale to an F4 unit to use F4 exhausts. I am thinking of picking up an f4 full exhaust and adapting it to my Brutale. Is there a difference in angles of the subframe or is it just Brackets. I know the F4 and the Brutale have the same frame. I wonder how different the subframes are. I know the F4 tail looks pretty rough on the Brutie for sure. Any body know if the Arrow system would work?