hi friends, i hav an audi a5 coupe 2.0 tdi 177 bhp 2013 sline , the thing is the rear diffuser is mince and tatties, is there any options to change it, i dont want quad exhausts, at the moment there is just twin exhaust at left side, so my question is what options do i have for changing it, many thanks any advice would be awesome, if need be and i get an s5 diffuser what will it take to add the extra exhaust.