Or you could try vents? They are more subtle.

But..muh sleeper. It's being tested this week, we'll see if it has any problems with cooling.

I wouldn't say the engine is modified though, it originally came in the Daihatsu Mira L5, my cousin bought the halfcut and stuffed it in his car. So the engine is technically "stock" because we didn't do any modifications. I originally thought you meant the orginal ECU as in the one that came in the halfcut.