Will this lip interfere with my trunk seal or rear bumper fitment?

This is a front-mounted air dam, so it does not contact the trunk or rear bumper. Confirm clearance with your front bumper cover and any existing undertrays before final installation.

What surface prep should I do before painting?

Sand the surface and prep it as you would any bare FRP component before applying your chosen primer and topcoat. Follow your paint manufacturer's instructions for adhesion and cure.

Does this lip maintain stability at highway speeds?

FRP construction provides rigidity without flex. Mount securely to all factory attachment points and verify fastener tightness after your first 100 miles to ensure no movement under load.