The STS-4CHSS Sequential Turn Signal kit will convert the taillights on your 2008+ Dodge Challenger into Sequential Turn Signals. This is a true Plug-N-Play kit. You do not have to break off any rivets. There is no need to go into the fuse box to make any connections. Return to stock at any time without any evidence of ever being there! The kit contains pre-wired, plug-in harnesses that install with no wire cutting or splicing of any kind. (Note: 2011 and newer cars may need one ground wire splice) * This kit features Smart-Sequence technology. Your tail lights sequence ONLY when a signal is on. When you hit the brakes, all lamps come on together. Plus, these harnesses feature sophisticated electronics that automatically adjust the sequencing speed to match the turn signal flasher in your car. While other products offer you fixed timing or complicated manual adjustments, these electronics sense your car's flasher speed and adjust the sequence timing for you.