Ryan2011RS,
There you have it, 2 x pistons sacrificed because the ECU/ tune was pushed beyond its limits. I really do hope for all the FI V6ers the ECU can be cracked/tuned to full potential. Just do your research and use common sense. Plan on spending at least $23-$30K to get to the 500HP ranks with internals, suspension, drivetrain, tune, clutch, meth, gauges, labor etc.
Simply just getting info out there so people don't make the same costly mistakes. Maybe somone out there knows the people that designed/wrote the code on the ECU from GM that can provide some sort of info/feedback.