Will this interfere with my tonneau cover or bed cover?

This spoiler mounts at the tailgate edge. Most tonneau covers clear it without issue, but a loose-fitting cover or low-profile design may have contact points — test-fit before final installation to confirm clearance on your specific tonneau.

Does it stay stable at highway speeds?

Yes. Factory-mount construction and hard panel rigidity keep it solid under load. The design angle helps manage airflow rather than catch it, so stability is solid at normal highway speeds.

What prep work do I need before painting?

It arrives primed and ready. Light sanding with 220-grit to scuff the primer, then standard automotive paint process. No additional surface prep needed beyond that.