It will be quite an expense, as far as I know the ECU on the 160sr can not have a piggy back ECU attached to it, so you'd need a complete new ECU like omex.
You'll need custom manifold, custom piping for intercooler and feed to the throttle body. Then you'll need someone to fit it all, and map it, reckon you'll be looking at a fair few grand for it, probably not worth it, if you are interested though, Ed will be your man here to ask.
Well with other 1.6 turbo engines, 140 BHP will be easily acheivable.