Do these deflectors require drilling or modification to the door frame?

Installation method and any modifications needed depend on your specific vehicle's door design. Verify mounting compatibility with your OEM door frame and window regulator configuration before beginning installation.

What prep work is needed before painting?

Sand and prep the surface with appropriate sandpaper and filler as needed to achieve your desired finish. Clean thoroughly to remove dust before applying primer and topcoat. Follow your chosen paint system's application guidelines for best results.

Will these fit if I have aftermarket windows or door glass?

Aftermarket or modified window assemblies may require fitment verification. Check that the deflector mounting points align with your door frame before purchase. If your setup includes non-OEM glass or regulator components, measure against the deflector design to confirm compatibility.