[Excaliber]

I assume by "filled" it means the water passages in the block are filled with a specical kind of "cement" that strengthens the block, but of course, dramatically reduces the cooling capacity.

Thus, a "filled" block is basically a "drag race" only block. Some fill them only partially, some more. I wouldn't want a fillled block of any kind and WOULD cancel the buy when I found out.

The comment is under "Buyer Feedback".