ive put a HID kit on the escort, its awesome, but highly illegal. newer cars that have HID have self levelling headlights, so they sense when the rear of the car is loaded up, and they change the angle of the headlight to counter this. about 25% of cars that go past my car normally flash me thinking my high beams are still on, when i put my toolbox in the back, weighing down the back, lifting the headlights angle up, about 75% of cars coming past felt they were too bright.
its the easiest comversion you could think of. mine came with a plug and play harness. as long as you have un-sealed beams. you just unplug the current globes, put the new ones in, mount the modules, plug it all in, then run the provided wire to the battery for + and - and your away.