Engine (inluding head / charge carrier)
Turbo
Inlet Manifold (Inluding injectors etc...)
Exhaust Manifold
ERST Loom
ECU
Intercooler
All pipes that are need (I/C Hose etc...)
Better Brakes! lol

Thats what I reckon - probablly get told otherwise though, and ive probablly missed a few bits out.

CheeRS