For the Crossfires,

License plate bulbs does not matter. So I used Sylvania/OSRAM bulbs that are $10 each. They are sealed, provides the best protection against moisture. You put them in, you just don't need to worry about them.


There are various "canbus" LEDs that'll work with the Crossfire. I usually hunt them down on Ebay. Most of them works good without too high of a price tag. I have tested numerous LEDs that fits and doesn't trigger the "bulb out" warning ranging from $5 - $55 each set. If you buy those cheap ones from Ebay, just HAVE to make sure your headlight/taillight housing is sealed good, then they'll last you a long time. The link below has the seller info from ebay, I've bought couple from them. Despite they are not that high of a price, their customer support was good, they replace warranty claims quickly.
http://www.ebay.com/usr/epanda_house...p2047675.l2559

HID, I recommend using TRS(The Retrofit Source)'s Morimoto 3Five. They produces a high output if you stick with 4300K - 5000K bulb. Their "canbus" adapter is sealed, and works very well. You will need a set of those adapters. I have tried other "canbus" adapters from ebay and they don't seal them right and will always fail.
http://www.theretrofitsource.com/hid...l#.U90_j1YsKIw

I usually don't recommend using LED in turning signals. Just counter productive really if all you want to do is just stick a bulb in and expect to work. If you're interested in further modifying the housing, pigtails, then they maybe right for you.

I also don't recommend using HIDs in high beams, can't flash people anymore due to the latency of "firing"(ignite) the bulb.