Will this interfere with the factory trunk lid when it closes?

Check clearance by opening and closing the trunk with the wing in place before final fastening. Most installations sit flush, but verify fit on your specific setup to avoid contact with the lid when fully closed.

What mounting hole pattern should I use?

Reference your vehicle's existing rear panel hole locations and drill mounting points to match them. This ensures alignment with factory anchor points and prevents uneven mounting stress.

Will the wing stay stable at highway speeds?

Once properly fastened using appropriate fasteners and torque specs found in your service manual, FRP wings are designed to handle highway speeds without flex or movement. Ensure all mounting bolts are tight and secure before extensive driving.