Will this interfere with my trunk seal or tailgate?

The lip sits on the lower rear deck, not the trunk lid itself. Verify clearance with your vehicle's OEM trim line before final installation to confirm no overlap with weatherstripping or closing mechanisms.

Should I use adhesive or drill mounting holes?

Both methods work depending on your installation preference. Adhesive offers a clean look with no fastener holes; drilling provides permanent mechanical attachment. Prepare the mounting surface thoroughly to ensure bond strength or proper hole alignment, then follow your chosen method's requirements for fastener spacing and adhesive cure time.

How stable is FRP at highway speed?

FRP is rigid enough to handle road speeds without flex or vibration. Proper installation—secure mounting across all contact points and even weight distribution—ensures stability. Avoid over-tightening fasteners, which can stress the panel; use even pressure across the mounting surface for the best result.