I just finished this and it took me about an hour and a half. Was kind of easy once I figured out angles for getting at those hose clamps. Unfortunately, the boot I replaced did not have a hole in it, but the one between it and the air box does. Hooray. When I got to the lower intake boot, I ended up removing that wall thing, and on installing the upper boot, I ended up removing the air box. Work smarter, not harder (as my former boss at wal-mart used to say constantly).
Suzuki DR-z400s / Jeep Grand Cherokee
'91 BMW 318is -> '95 BMW 318ti -> '00 BMW 328i