Intercooler piping

[124]

I am in the middle of gathering the required parts for plumbing in my new iintercooler and the one thing I need to know is this.

What diameter hose do I need to fit on to the compressor outlet? This is about the last bit I need to source.

I dont want to remove the original untill I have to as it looks a bit old and fragile I still need to use the car and dont want it to come off in pieces.

[turbomike]

im sure i used 50mm or 51mm internal diameter mate on the tubby outlet

[124]

Cheers.
Can anyone else confirm this just to be safe as I dont want to order the wrong size hose cause elbows with reducers etc are quite pricey.