Will this interfere with my trunk when it opens?

The lip extends from the lower rear panel — verify clearance with your trunk lid by measuring from the hinge point down. Most C4 and earlier setups clear without issue, but confirm your specific trunk seal height before final installation.

Can I drill through the FRP for direct bolt-on mounting, or should I use adhesive?

FRP accepts both methods. Drilling works — use a standard bit and backing plate to prevent cracking. Adhesive also works for a cleaner look with no visible fasteners. Choose your method based on intended removal ease and local vibration levels during highway driving.

How does FRP hold up to speed and road debris?

FRP is stable at highway speeds when properly mounted and aligned flush to the panel. For longevity, keep the primer coat sealed — either paint it or apply clear protective film to prevent UV exposure and minor impact marks over time.