Thermostat to turbo water pipe size

[akyakapotter]

Hi all I’m having my TD04 water pipes made up by a friend. What I need to know is what size do the pipes need to be from the thermostat housing to the turbo. Id like to know the inner diameter please thanks in advance nick.

[Flaminsam]

10mm or 3/8" internal diameter.

[akyakapotter]

Cheers dude your a legend