i know they sell a box for supras that gives a "dummy" signal to the ecu for the rear o2 sensor so you can remove the cat. do they make one like this for the ls400 as well? i see people complaining of clogged cats and this would get rid of the front 2 without causing the car to run bad. the third cat can already be removed with no issues.

edit: shouldnt this work?

http://www.o2simulator.com/index.php...c27ef904c69bf3

 

no box needed no code thrown by post cat O2 sensor