A brief spec of the power side of things;

RS injectors
RS spark plugs
Dreamscience decat
Dreamscience hybrid turbo (turbo X)
Piper catback
Magnex downpipe
Airtec plenum
Airtec intercooler
Pro Alloy cold pipe
Super size air filter
Roose inlet hose & intercooler pipework
RS oil cooler

Good for 352bhp and 435Ib/ft

Depends what your goal is power wise - stage 3 is great for all round use

Rob