The HID headlights are deisgned for HID bulbs which have a different sized/shape filament compared to the haolgen bulbs... So yes, they are different.

You can always install a PnP type kit if you want HIDs, just remember to re-aim them. There's a small chance you'll get pulled over but you'd have to be asking for it to get defected for it.

Also try asking all your queries in this thread ==>http://www.ozhonda.com/forum/showthr...2011-FD-Civics