turbo upgrade

[archangel_7]

From what I understand is the K03s and K04 use same size compressor wheel? K03s has slightly smaller turbine wheel/housing (not sure which one, if not both) than the K04...SO IM ASSUMING the K03/K04 turbo will be a different attachment on the turbine wheel housing assembly? Isn’t that what a k03/k04turbo is? Your original turbo with the different assembly?

[archangel_7]

Thats an A4/Passat turbo , its completely different .
Your running a KO3s , not worth changing to ko4 unless your searching for every last hp !

Yeh your probably right there mate, I realised now that it wouldn’t be worth it considering its only a 5mm difference on the turbine wheel, which would threrefore mean more turbo lag I would be guessing.

[99gti]

The one posted in the OP has a different housing to the one that is used in the polos.