Will these change my ground clearance or air dam clearance?

Side skirts sit along the rocker and don't lower the front or rear splitter line, so ground clearance stays the same. Verify fitment at the front wheel well and rear quarter panel before final install to account for any suspension modifications or wheel offset on your setup.

How do these mount — adhesive or bolts?

Mounting method isn't specified with the product. Dry-fit them first and decide based on your preference: adhesive gives a cleaner look, fasteners are reversible. Either way, sand and prep the mounting surface before committing to your chosen install method.

Do I need to paint these before installing?

Yes — these ship unpainted. Sand and prep the surface, then apply your chosen primer and paint. Polyurethane takes standard automotive paint well; just follow your paint system's prep and cure times before final assembly.