[PSB]

I have been researching this also. As I understand it, hypereutectic pistons can be manufactured to closer tolerances than forged pistons, so they "fit" better in the block. This means less ring wear and a longer life engine. However, they are more brittle than forged pistons and may not be a good choice if you are planning on running NOS or a blower. I'm going with hypereutectic pistons on my 396W.

Pete B