You have to take a section out of the lip of the box /sheild the size of the brace so it fits through...its simple though and I know someone with the alta on a GTT brace thats done it and anouther with the JCW which requires the same thing to be done. A hacksaw and some effort is all thats required...oh and measuring if you want it looking neat. I have the OMP brace which means this does not need doing to my alta
