Download 2018 Honda Civic Side Under Spoilers Installation Instructions – Installing the Spoilers 1. Turn the steering wheel fully counterclockwise. 2. Remove the three self-tapping screws from the left front inner fender. 3. Remove the two self-tapping screws from the left rear inner fender. 4. Remove the four clips from the left side sill trim. 5. Open the left front and rear doors. 6. Remove the left side sill trim. 7. Close the left front and rear doors. 8. Remove the 11 clips from vehicle panel.
9. Remove and replace all 11 clip seals. 10. Remove three spring nuts from the left side sill trim. 11. Install the three spring nuts on the side under spoiler as shown. 12. Install 11 clips on the left spoiler. 13. Install the left spoiler on the vehicle panel. 14. Attach the left spoiler to the vehicle panel with four clips. 15. Secure the front of the left spoiler with two self-tapping screws. 16. Secure the back of the left spoiler with two self-tapping screws. 17. Turn the steering wheel fully clockwise and repeat steps 2 through 16 on the right side of the vehicle.