[MEGA]

You absolutely need sound deadening. The doors will need a speaker pack each and the boot will need a trunk kit. The more sound deadening you have in the boot floor, rear quarters and bootlid the more bass will come toward you and not out via a rattly numberplate and in to nothing.

I would suggest two speaker kits (£15 each), a wedge pack (£130 for the whole boot), dynaliner to help eliminate rattles, and a few spare sheets for inner skins etc. Look to spend a good couple hundred if going the Dynamat Xtreme route all in.

You could look at other manufacturers such as brownbread who are roughly the price and allegedly just as good