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OH alright i heard u had to do some drilling from several friends thats why.. but good to make sure i dont...im going for a stock look, how bright should i go ?
the power from a relay comes directly from the battery, so the power is constant. the power from the bulb connector is not always constant. so you get some flickering.
with a relay, you also have a fuse to protect the HID kit. it's cheap to replace the fuse, expensive to replace the whole kit.
Drilling is optional if you want to run the wires to the outside of the dust cap and down to where your ballast is, assuming you want to mount the ballast on the outside of the headlamp.
Relay harness is always optional but recommended, HID kits upon start up draw a surge of power to ignite the ballasts, this prevents your stock harness from frying and gives you a constant power draw to your kit. However, an HID kit frying a stock harness is very rare.