The '99-'04 tails are taller than the '96-'98 tails. Aside from the fact that the wiring harness is different, the trunk won't sit like it's supposed to when it's closed if you switch taillights. When closed, the bottom edge of the decklid ends up sitting on the rear bumper, which unfortunately would suggest that you would need a '99-'04 rear decklid as well as the '99-'04 rear bumper to make it fit like it's supposed to.I have a 1996 Acura RL and I really dislike the stock tail lights. I am wondering if the 99-04 spec tails would fit on mine. Has anyone ever tried doing this conversion. I just wanted to know if it was a direct bolt up or would i have to do some drilling and cutting. It seems like the 99-04 tails are a bit wider.