your sound will be pretty shoite without front components, you just need to get the speaker grills and they will go into your door pockets as the speakers attach to the back of the grill. If not then you just need to get different pockets, easy to find not many GTis came with the door bins, would make a huge difference to sound, Get some boxed 6x9s and a small sub in the boot, saves cutting the parcel shelf, hook the old 6x4 wiring up to the boxed 6x9s and you will have some good sound its what i had in my blue mk2 and it sounded great.