Thanks guys, and yes, it was pretty easy. Until I found out I had ordered the wrong springs, (comfort instead of the needed sport springs). Oh well...down to 4 cars for a few days while I wait for the new air springs to show up.

BTW, assuming you want Arnott air springs, it seems the place to order these is directly from Arnott's web site; they are $99 ea. there and ~$140 at ECS or others.

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2014 BMW 328i Xdrive
2011 BMW 335i M-Sport
2008 BMW X5 4.8i Sport
2000 BMW 528i 5sp