The headlights in question fit the OEM bulb
Get HIDs that fit the OEM bulb size
they are plug and play. If you want them to last a long time, perhaps invest in a HID wiring harness so the ballasts get consistant voltage and die out prematurely.
01' Silverstone WJ Limited
-Debadged, K&N CAI, Quad taillight mod, Yellowtop Optima, 3000 watt stereo setup, Kolak 3' Catback (flowmaster 70 with magnaflow tip and high flow magnaflow cat) with DMH electric cutout, Overland woodgrain wheel