Yes. Drilling is required to install the rockers as they are secured in place by rivets. The side skirts come pre-drilled, so you will simply line up the rockers to the panel and drill the necessary holes.
What is the difference between the two surface finishes?
Primer is an unpainted surface that will need painting prior to install. It is unadvised to install a primer unit as there are no UV stabilizers to protect it from sunlight exposure. Satin Black is a matte black finish that is dull in appearance similar to what you would see if you black Plastidip something.