Have found this on the ZF site confirming that the 6HP26X will take 444 ft lbs or 600nM.

http://www.zf.com/media/media/docume...8X_Catalog.pdf

Looks like I answered my own question. Will leave it here for future reference as literally nothing came up on google.....only things in Russian and references to certain Land Rovers.

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2005 3.0d Sport - Sapphire Black
Engine : Bluefin Superchip Tune,
Wheels & Sus: Style 168s (10.5s all round), H&R RDA Spacers, Bilstein B12, Eibach 40mm drop, Whiteline RSB
Exterior: Le Mans flares, 4.6is kit F&R
Interior: Dynavin N6, Blackvue DR650 dash cams

My Build Thread: http://www.xoutpost.com/bmw-sav-foru...run-sheet.html