From what I've read..."corrected" is generally a mustang dyno, which applies rolling resistance to give a number as to how much power is actually reaching the ground. "Std" would be a dynojet dyno which doesn't apply resistance (though I think I've read that some can) so the numbers will be higher, or closer to the actual crank hp. For our cars with the TR-3650 tranny, dynojet numbers are 84% of the crank hp (Tremec estimates 16% drivetrain loss) and mustang dynos will read 10% less than a dynojet. Someone correct me if it's needed.