Included in your kit are:

2) Taillight Modules ( right and left ),
1) Flasher Module, Complete illustrated instructions.

There is nothing else to buy nothing extra to install. Reuse your old lenses since these taillights run cooler than the standard incandescent bulb!

Installation is a snap. There is no need to add additional wires or the drill and modify the lamp housing. LEDs ( Light Emitting Diodes ) use less current than the standard Mustang incandescent bulbs relieving stress from your alternator. LEDs last longer and look brighter and redder! Use your existing lenses and wiring! No extra components to buy! The entire installation can be done with a single screwdriver!