The installation of housings and bulbs on Challengers is straightforward. You will need to work in the trunk, but you can hide three bodies back there so you’re good. Pop the trunk, pull back the carpeting to reveal for the bulbs, and disconnect them. Along the lip of the trunk, it’s the same process but you’re working upward. If you’re just replacing the bulbs, you can simply remove the old bulbs and install the new ones with their appropriate harnesses.
For housings, in the case of a repair, you’ll need to remove the hardware that holds the stock housings in place and swap in the new ones from there. It’s worth noting sequential lighting systems for the Challenger are a bit hard to find and might require custom work. In this case, you already know the price is high. For 2008-2013 Challengers, harnesses are readily available from many sources to make this happen.
If you’re dealing with a 2014-current Challenger you’ll likely need to consult a professional to do the custom work for you. Sure, you’re going to be paying a good amount of money to have it done, but you can rest assure nearly no one’s Challenger is quite like yours. Plus, you won’t have to do any installation work.