Car overheated

[Singh]

My car started to overheat a few days ago so I parked up to avoid damage, I could see coolant leaking out the engine. AA came out and said that a T Pipe has burst, I didn't speak to them myself as I had to be somewhere but that is what my uncle told me who delt with them for me.
I haven't started it since but it isn't holding coolant because of the leak. I have found this thread which suggests others have had the same problem. Could someone please get me an Etka diagram/Part no of the 'T Pipe' I need to decide to either get it recovered to a specialist or attempt it myself after Christmas, I didn't realise how great quattro was until being forced into driving front wheel drivers in this snow.

http://forums.audiworld.com/showthread.php?t=2787318