Jim143 said:
I have a quick question. I have a 2003 4runner and I want to install fog lights and put in the HID bulbs in the headlights.
I understand the issues with using the Xenon bulbs as high beams and will regroup and use Silverstars for them. But I can put in Sylvania HID bulbs in place of the current bulbs for my low beams?
If I need that kit, I will be bummed. I dont want to have to spend $200+ when I can get the sylvania bulbs at my local auto parts store for $44 for both of them.
I looked at the Xenon Depot website for the kits and I dont understand how they work versus just replacing the bulb (HB4). What is all that other wiring and other parts for?
The closest you can get to HID without all of the wiring harnesses, relays, ballasts, ignitors, etc, is with HIR bulbs. However, if you are looking for a superior light output, you won't be able to find any way around an HID kit. When I bought mine, I thought of it in the sense that HID bulbs will outlast any other bulb by far, so the money is worth it in the long run. It all depends on how much light you want out of your vehicle.
As you can see with the pictures above, even a $90 set of PIAA bulbs are absolutely nothing compared to the HID kit, and although Sylvania Silverstars are great, they won't be better than the PIAA bulbs, hence nowhere near HID brightness.
Going back and re-reading your post, it also seemed like you were also asking if you can just buy the HID bulbs and throw them in, and the answer is no. They won't work first of all, and second, even if it did, without the proper ballasts, relays, etc, you will fry your harness and cause possible electrical problems. So $224 for a kit is the only option.
If I left anything un-solved let me know, I'd be glad to help.