Soon to be fitting a new top mount intercooler to MY00, would i need to get this mapped straight away, or would it be o.k for a couple of weeks until it is mapped, basically would it cause any damage if not mapped straight away.

 

unlikely to be a problem IMHO. Engine may just not make best use of the new TNIC over the old one, but would be safe. ECU may even learn to use it, since MAF would see and air flow increases and ECU fuel accordingly.