although they are said to be expensive its not realy, to get the most out of a td12 you need, a good condition engine, td12, external mani, decat and wastegate. total costs of around £1000-1200. for the most out of a td04 set up you need, forged engine, mani decat, td04. total costs of around £2500-3000 based on no management cost in either set up and based on buying a basic forged lump from a trader, so yea the turbo is expensive, the end costs and overall set up isnt. isnt realy that hard to way up, yes you can just bang a td04 kit on a stock engin cheaper but you have ended up with a laggy 200bhp starlet that gets pissed on buy gys runnin 180bhp starlets till you hit 100mph+ think long term and its realy a very good afordable set up tbh