No, not like, all steel braided, use tubing with a rubber core, and braided covering. Use a braided radiator hose, or a larger heater core hose.
If you want to be cheap, just get a braiding kit (like the spectre hose cover kit) and cover the factory ECU breather tube.
You can get braided hoses pretty fat (some are bigger than our radiator hoses) and the rubber core would eliminate heat soak issues which isn't much of an issue, since the line is braided, and not solid. Braided brake lines manage to keep the brake fluid cool enough, so I doubt that it'd be an issue with the ecu's airflow. Honestly, if heat were a major issue with the ECU, they wouldn't have put it under the Hood
in the first place, they would've put it behind the glove box or behind the center console like on other cars. the tube's just there so it can "breathe" in that weatherproof sealed box (which keeps the water out). It's not like an overclocked PC, it's solid-state engine management.