2" (50.8mm) length, 3.625" (92.1mm) diam ordered from above website. I could find NOTHING locally. this is an oddball size really.
now i sit and wait for delivery...
It only cost me $27 CAD (plus $100 CAD for E70 TB part) so its not too expensive of a science project. if I end up modifying the 95mm end of air tube (trimming it down to 92-93mm)... thats when it gets expensive, if I need to go back to factory designed air tube as they are a costly bit, for being a plastic tube.

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I swear, my cars are like a girlfriend.
Sometimes its a rough ride, sometimes its smooth motorin'.
Sometimes she doesnt like how i treat her and sometimes i dont like how she behaves.
BUT at the end of the day, she loves it when I am inside her.

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'91 850i
'05 X5 4.4i
'09 Clubman S