Will this bolt directly to my air box without any modification?

Yes. This duct uses factory mounting points — no drilling, cutting, or adapters needed. Line up the connection points and secure as you would with the original part.

Do I need to replace any clamps or fasteners when I install this?

The duct assembly itself is included. Clamps and fasteners that hold it to the air box are not confirmed in this listing — test-fit first to see what you're working with, then source any hardware separately if needed.

Can I reuse my old air filter with this duct, or do I need a new one?

Your existing air filter will work fine with this duct. It integrates with the same filter housing as the original part, so no filter swap is required for installation.