Originally Posted by pixelblue
Try titanium shims instead. They will reduce the heat transfer better than the stock plates
Yes, I actually have them, but they don't correct the fitment issue I'm referencing. The stock plates wrap around the edges of the pads (front to rear) making them a nice snug fit inside the calipers. The TiAl plates do not wrap.
The HP+ pads have the extra room for this bit of wrapping around the edges. Until I'm confident it's not a shear stress which is cracking the ceramic piston caps, I'm not comfortable mounting a loose pad, especially for a track event where high-heat might contribute to the issue.
This is why I'm looking for the OEM backing plates. I have a sneaking suspicion these aren't gonna be available other than on a new set of pads, but hoping maybe somebody knows better...