well the fastest pass in an ss/ah car last year with diamond pistons was a mid 8.30,, i think fastest for millers was the same

if one was looking to buy pistons,, though i think i can offer as good as anybody,, your best bet is to goto westcott,, there are many dimensions that go into making a piston that makes power and doesnt crack or scuff the crap out of the walls,, seems like most manufacturers dont know how to do that,, but working with a racer that has made changes to make their stuff live,, is your best bet