The black plastic trim that is around the edge of your rear bumper should clip off and clip onto the S bumper, hence no need for cutting holes for the exhaust....
...the S bumper doesnt have 'chromeline' so no, these bits will not go accross....
...as for the grille, are you not able to take the chrome grille out of your exisiting bumper and use that?
..also what exactly has happened to your MINI??
