Do I need to remove the rear bumper cover to install this reinforcement bar?

Yes. The reinforcement bar mounts behind the bumper cover at the frame attachment points. You'll need to remove the cover first, then bolt the bar in place at the factory mounting locations.

Will this fit if I have aftermarket bumper add-ons or diffusers?

This reinforcement bar is engineered for the stock rear bumper assembly. Any non-OEM bumper extensions, diffusers, or custom modifications may create clearance issues — verify your current setup before ordering.

What hardware do I need to bolt this in?

Fasteners are not included with this part. Check your vehicle's service manual for the correct bolt size and torque specifications for the rear bumper reinforcement mounting points.