The spoiler can either bolt on or bond on. The end caps Bond on. This Spoiler is custom made, brand new aftermarket parts. They are made of durable BLACK fiberglass, not cheap white glass or ABS Plastic. All kits are sold as unfinished products, prep-work (i.e. sanding, cutting, filling, body work and primer) and painting is required for the best finished look. Items come in gray primer. Professional shop with body kit installation experience recommended.