Hey Guys. Does anyone know how I can look at the LS400 calipers and know that they are just that? I am buyiung some but would like to know that I am buying the best thing.

Make sure they are 4 pot calipers, they usually have that definitive line through the middle of the face like posted above where the Lexus decal is.

What year did the LS go the four piston caliper ?

1995-2000 are all 4 pot options. Try to pick up newer ones, they probably have low miles, and in great condition.