Genius. Would be nice to have some feed back from someone who's put 20k on the thing. But it does look bullet proof. I seem to recall that BMW changed the driveshaft length for the better at some point, but I dont recall the build date. Nor can I read the part number on mine. It looks fine and the AC line is slightly offset and therefore doesn't drip on the splines at the t-case, but I worry about it stripping on the highway.