If I have Adrenaline rush on a ship, and that ship is stressed. Can I perform a K-Turn?

When you reveal a red maneuver, you may discard this card to treat that maneuver as a white maneuver until the end of the Activation phase.

Yes. It happens immediately after you reveal a red maneuver, turning it white.

Adrenaline Rush does not require you to perform an action, so it's not restricted by stress. You simply flip over your dial and tell your opponent you're using Adrenaline Rush and it's all good from there on.