Do I need fasteners to install this?

You'll need bolts to secure it to the frame. The bracket mounts at factory attachment points, so check your service manual or OEM parts diagram for the correct bolt size and torque spec for your model year.

Will this work with my aftermarket bumper cover?

It's engineered for the OEM bumper cover profile. If you're running a different brand or style cover, test-fit the bracket first to confirm alignment before finalizing installation.

Does this require any prep before install?

The bracket ships ready to mount. Clean the mounting area on your frame to remove dirt and corrosion, then bolt it down at the factory points.