Do these louvers come with mounting hardware?

Hardware is not confirmed in the product specs. Test-fit the louvers against your rear window frame first to determine whether fasteners or adhesive will work best for your installation method.

Can I paint these to match my van's color?

Yes. The gloss black finish can be prepped and painted. Clean the surface thoroughly before priming and painting to ensure proper adhesion.

Will these fit without any modifications to my van?

These are designed to mount at factory points on the rear window frame, so no drilling or cutting is needed. Verify the fit against your specific vehicle before permanently securing them.