The supercharger has been done quite a few times on the LX570 in the Middle East. The Tundra's kit is all bolt on the LX, only issue is the tuning. Some people have left the ECU to figure out what the heck goes while other have resorted to a Unichip/custom tune. I personally would pass on both options but its worked for quite a few and they have not faced any issues. I dragged against a S/C LX in my S/C Tundra; he pulls on me from a standstill but i bring him back in and overtake by around 40MPH.. Advantage of starting with AWD, he did spin out all 4 though

Another option which has just come out:-
http://www.hennesseyperformance.com/lexus-lx570.html

 

The SC on that "invader" sounds an awful lot like an eaton blower from a Cobra which has been done on an ISF. Perhaps they followed the same route. Btw that things body kit should promptly be burned with the red interior.

 

I wonder if they sell the blower seperately.. I'm guessing they worked together with Toyota because theyve tuned the ecu and thats nearly impossible without Toyota's help