Will this interfere with my trunk seal or undercarriage components?

No. The Z1 lip mounts to your existing front bumper and sits forward of the fascia. It does not extend rearward into the engine bay or contact trunk seals. Install location is purely front-end facing.

Do I need to drill through the bumper, or does it use adhesive?

This assembly is designed for bolt-on installation using existing or new fastener holes in your OEM bumper structure. Verify your bumper's mounting points before ordering to confirm hole alignment with the lip bracket locations.

Can I leave the carbon weave visible, or do I need to paint it?

Both options work. Raw carbon fiber looks sharp as-is, but a clear coat protects the weave from UV damage and makes cleaning easier. If you prefer color-match to your bumper, sand and prep the surface before applying your chosen finish.