Do these require mounting hardware, or does it come with everything?

Hardware is not included with the flares themselves. You'll need fasteners appropriate for your vehicle's mounting points — refer to your service manual or test-fit before committing to a fastening method.

Can I install these myself, or do I need a shop?

Installation is designed for DIY use with basic hand tools. Expect straightforward bolt-on mounting to factory attachment points; no cutting or drilling required.

Since these come glossy black, do I need to do any prep before bolting them on?

No prep needed — they're finished and ready to install straight out of the box. If you want to match a different finish or customize the look later, the glossy base accepts paint or coating touch-up easily.