Not trying to preach but telling you from experience, aftermarket headlights and tailights need to be adjusted to fit right. I bought Autodynamic black housing headlights and those were a pain to made fit, and tehres still about 2mm gap on the fitment and both sides. Im not totally satisfied with it so I might just paint my stock headlights and sell these black housings.
And they don't sell carbon fiber tailights for the 4 door 99-00 Sedans, but what you can do is buy some off
Parts Trader for cheap, and open them up somehow without breaking them and paint them black. Lot of work, but it'll definatly make your car stand out
BTW heres a pic of my headlights, its hard to tell since the cars balck , but theres gaps on both sides.