Will this interfere with my trunk lid or rear lights?

The J-Spec 2 diffuser extends below the OEM bumper line. Before ordering, verify clearance with your current bumper setup and inspect the brake light housing position on your vehicle. Most stock configurations have adequate space, but aftermarket bumpers may require fitment verification.

Should I use adhesive or drill through for mounting?

FRP accepts both methods depending on your preference and bumper material. Adhesive provides a cleaner look with no visible fasteners; drill-through offers mechanical security. Reference your vehicle's OEM bumper structure to determine which mounting approach aligns with existing attachment points.

Will this spoiler stay stable at highway speeds?

FRP is rigid and resists flex. Proper mounting — whether adhesive or fastener-based — ensures stability. Apply even pressure across all attachment zones during installation and verify no gaps remain after curing or tightening.