C20let Vacuum hose

[Chipa]

How many mm Vacuum hose. on C20let the turbo?

I would like to buy on ebay-. And I do not know what size is best.

[Chipa]

You need both 3mm & 4mm.
Best to use hardline wherever possible, especially for the map sensor line from throttle body to ecu, using silicone for the connection.

Thanks a lot!