Will this wing stay stable at highway speeds?

Yes. The four-piece FRP construction is engineered to handle sustained wind loads at speed. Proper installation using factory mounting points ensures full panel rigidity. Verify all fasteners are secure before driving, and periodically check tightness during the first 100 miles.

Do I need to drill new holes, or does this use factory mounting points?

This wing uses factory mounting points — no drilling required. Confirm your vehicle's OEM mounting hole locations match the wing's attachment pattern before final installation.

What happens if the trunk lid closes against the wing?

The four-piece design allows you to test fit each section before committing to final assembly. Test trunk lid clearance with the wing loosely mounted before tightening all fasteners. If clearance is marginal, slight shimming or repositioning of mounting brackets will resolve interference.