Smallblock Pistons: 1 question.....KB's -or- Sealed Power(SpeedPro hypers)???

thesiren74 said

Speed pros are strong, been abusing them since 2012 in my old 360.

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Exactly.
You really have to abuse and detonate hard before the hyper will shatter like mine, but I'm pushing mid 500 hp with a 4" stroke and damn near 200 psi cranking...nothing you can compare to the average street motor.