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I understand now. Obviously, I didn't read the original, transcribed Tech Service Bulletin. Here's what you're looking for:
Abused 968, everything stock and uncared for.
That little crescent looks to be some sort of steel, given that it's rust that you see on there. It must be some kind of glue that they used, those things seem super solid on the strut mounts.
Cheers
Ah! Thanks! Great find. I expected something much more involved to install. Now the 2 part glue is no longer available from Porsche...
Now you have a compressible fluid in the calipers and during the very hard braking, the heat generated could be causing erratic gas expansion/contraction (flutter) in the calipers. It is a pretty simple and inexpensive thing to check. FWIW!
Good Luck!
System was bled last fall season, but I'll check it again. The noises do not occur under hard braking however, only on light to moderate braking at very low speeds.