Does this come with fasteners to mount it to my mirror housing?

Mounting hardware isn't specified—test-fit your mirror assembly first. You may reuse existing fasteners from your original lens, or contact us to confirm what hardware is compatible with your specific mirror bracket.

Does this include both the left and right mirror glass?

No, this is the right side lens only. If you need to replace both sides, order two units separately.

Do I need to prep or paint this before installing?

The lens arrives ready to install as-is. Since it's a glass/optical component, painting is not recommended—just mount it directly to your mirror housing.