Hide NavMesh Agent Properties in Insector

I'm using a NavMesh Agent, but the variables ie. speed etc are set in code, as these change depending on the situation.

I realize that i need to have this component on the game object, but I do not want these values to be overridden in the Inspector. Is it possible to protect against this, or possible to hide these values?

 

This is more of an editor coding problem, I suggest taking your issue there since those forums are more lively.
That said, topf of my head I don't think it's possible to override the inspector in this case because the built-in inspector is already an override. If you'd write a new inspector (I suggest doing so only if you have the code for the original), you still need to find a way to tell Unity you want to use your new inspector instead of the built-in one.
I'd honestly just make sure your prefabs don't get changed, definitely keep an eye on that if you're using version control.