So one guy say's he thinks the aluminum XR2 will only go 4.1" bore. And everyone repeats it.
There is no reason this block in aluminum can't go at least 4.185". After all the other aluminum blocks with this bore space go 4.185".
the question that comes to mind.. is he referring to the block that is sleeved or unsleeved.. I know in the beginning he was selling unsleeved blocks and recommended people use the spray in liner.. I would imagine with a good quality sleeve maybe like a interlocking Darton set up you could get 4.200.+ but I have never physically seen an aluminum block
