Engine in the version 9 is a 2.0 and has stronger conrods than the version 8, they will run between 450-500bhp so im lead to beleive no problem with supporting mods, different seats as the black bits on the seat have lines on them were the v8 is just flat they actually hold you better aswell, different steering wheel and centre console, obviously the wider track and dccd box in it, think thats about it m8 unless anyone else can think of anything, speaking from driving gavs v9 and owning a v8