Will this grille fit without removing the bumper?

No, you'll need to remove the front bumper to access the mounting points and swap out the grille. It bolts to the factory holes in the upper and lower frame — straightforward job with basic hand tools and an hour of time.

Can I paint this grille to match my truck?

Yes. The grille comes unpainted. Clean it thoroughly and apply primer and paint of your choice to match your body color or powder-coat it for a custom finish before installation.

Does this grille block airflow to the radiator?

The honeycomb mesh is open enough to allow adequate airflow. It's not a solid panel — think of it as a more stylish version of a typical mesh grille. Cooling performance stays consistent with stock.