mods.... order of mods: maintenance: 100k service items. Rod and pressure test radiator. Compression test the cylinders. Fix current problems before increasing the horsepower. Intake Exhaust 2.5" catback or prefereably all the way from turbos. ECU and boost jets or boost controller, up the boost. underdrive pulley From there you need to decide how much money you want to spend. Personally Id only upgrade my intercoolers if I was going to upgrade my turbos. What sort of power do you want to make and how much do you want to spend?
approximate output from the stock cars ive seen at the dyno days, 145 - 160 rwkw seems about normal. 200+ is easily achievable at about stage 3.
218kw at the crank comes to mind so Im guessing your numbers are about spot on presuming about 30% drivetrain loss.