150 vs 180 hp 1.8T...anyone?

Does anyone know what was done for the newer Turbos? Was it just an increase in the boost or was there also hardware involved? Thanks. SC

Larger turbo k03 to k04 and ball bearing for longer life.
More boost and different car timing.

the 180hp gti's dont have the K04. it is the 225hp TT that comes with the K04 i dont think that there is anything diffrent with the 150 and 180 hp engines except tunning. i think that there are diffrent D/V's