Ls 430 Front Brake Pads

[Pyrex]

I have an 03 LS430

When checking out pads yesterday at the dealers for the front of the car I was told that there are now two versions, and that I should check the stamp on the back of the pad to establish which one is needed.

As previously only one was available it seems logical that if you quote the same number you will only ever get the same pad.

However if they have developed a second pad why was that? and what will be the differences?

I have long noticed that periodically the front pads have a tendancy to grate slightly, I am guessing that the different pads are intended to get rid of this phenomenon, which is probably due to the material being to hard.

The replacement pad is Black of the same stamp number is Black compared to the original being blue, and has a code 477-F3 with a box code 04465-OW 060

Whereas the other pad is coded PS534 -FF is a shade of red, and has metal strands protruding from the brake material. The box code is 04465-50250

Any ideas about the reason for the two types?

[Pyrex]

The simple answer to my question was fit the same number as was on the car already which in my case was 477-F3.

The improvement has been that the brakes do not seem to "grind" so much as the previous material did.