Will this interfere with my trunk seal or hood clearance?

No. The lip is engineered to sit below the bumper line and does not contact the hood, trunk, or any panel seals during normal operation. Verify your bumper mounting points are aligned before final bolt-down.

Do I need to apply clear coat, or does it come finished?

The carbon weave is visible as delivered. A clear coat application is recommended to protect the finish from UV exposure and minor abrasion. Sand and prep the surface lightly before applying your chosen automotive clear coat.

Will this stay stable at highway speeds?

Yes. Single-piece rigid construction and standard bolt-on mounting keep the lip planted and vibration-free. Ensure all fasteners are tight and check them periodically — carbon fiber does not flex, so any looseness will be noticeable.