Missiles cannot be outrun. Defensive engine maneuvers and upgraded distortion field can break missile locks before or after the missile is fired. Nothing else works against a missile after it has been fired.
Before a missile has been fired you can break a lock by breaking line of sight, but that's a matter of lock on time not of missile flight speed.
Doesn't the EMP pulse also break a lock if you get that upgrade? Or is that only a prevention from locks happening?