atom44wat's information is really helpful but I could not install the HID without removing the front bumper. He did an amazing job!!
So, here is an another HID conversion example.
0. I purchased a CATZ 4300K conversion kit from Litetswap.
1. Open the hood and test the new bulbs.
2. Remove two screws and two plastic snaps.
3. Remove three snaps from the tire housing.
4. Pull the rubber cover off from the bumper and remove a screw which fixes the bumper to the body.
5. Unscrew ten bolts from the bottom of bumper.
6. Lay bath-towels or a carpet on the floor to protect the bumper.
Pull the edge of bumper off from the body, both side. Be aware the bumper might fall down if it's loose.
Pull the bumper off from the center of front.
7. Unscrew three bolts of the headlight unit. these are not the adjusting screws for the light beam so don't worry! Throughout the job we don't touch the adjusting screws.
8. Open the plastic cap.
8. Make a 1-inch hole on each cap.
9. Install the bulb and clip it with a stock clip for H1 bulb and cover it.
10. I found the space for an inverter at the bottom of headlight unit, but the universal plates came with the kit did not fit. then I placed them where the photos show.
Left side igniter
Right side inverter
The HIDs are very bright but little bit yellowish than I thought.
4300K is exactly 4300K, not high, not low, not pure white.
I don't like the tinted 5500K because it's not a real light color, it's a shadow of blue tint but someone who prefer notn-yellowish color 5500K or 6500K might be a good idea.