The racks come with nice instructions (in Japanese), that have enough picture detail to make sense. The scariest part is cutting the rubber strip that runs in the drip molding. I checked before I started and new rubbers are available from the dealer ship for $160 per side.
Installation time for the first side was about 1 hour. I was being very paranoid. Second one was 30 minutes.
After installing the rails, I went to the SportsRack and picked up the 'Lowrider' adaptors to mount my Yakima cross bars on the rails.
Loaded up the surfboard this AM, and went to play in the ankle snappers..
Lexus should offer these things here!