Originally Posted by rrclx
Over a year and no one posted an answer and there really isn't one. Here is my take based on observation and years driving these cars. Corrections welcome.
The coils are unique to the LX as they are tuned to the hydraulic height control suspension system. They would not work without the AHC which takes some of the load through the shock absorber which is more a hydraulic ram controlled by the AHC. There is no point in changing the springs with anything else unless the AHC is removed and a standard Land cruiser coil suspension is installed.
So this means the LX does not have AHC? Interesting.
I love the adjustable suspension but sometimes forget to use it. Stays on soft ride most the time but it sure performs better under driving stress in the sport mode and really applies some stiffness when required.
I do wish I could drop the chassis at highways speed. But I know Lexus knows best.