Ford Mustang LED Tail lights - How To Install Shelby Taillights

Next, remove the factory taillight trim from the rear panel, along with...

...the taillight housing inside the trunk.

Test-fit the fiberglass panel to the car's rear panel. Some cutting and preparation is required for a good fit. Additional prepping is necessary for hardtops and convertibles. You may want to enlist the aid of a body shop to get a perfect fit.

Test-fit the taillight lenses to the fiberglass rear panel. Some trimming may be required here as well.

For mounting the LED panels to the fiberglass rear panel, the kit comes with two lengths of No. 6 threaded rod. Cut the rod into six studs approximately 111/42-inch in length.

Thread the studs into the tapped holes in the taillight bezels.

Trial-fit the bezel to the fiberglass panel. There are slots in the lens openings for the studs to pass through. Enlarge the slots with a round file or Dremel tool if necessary for a proper fit.

Position the lens and bezel into the panel opening.

Install the LED panel over the studs to sandwich the fiberglass panel between the LED panel and the lens/bezel assembly. Position the panel so the wiring is on the fuel-filler side.