Two VERY important things you need to know before buying halo projectors for your GTO1. THESE WILL CHANGE YOUR BULB TYPE FROM H11 TO H1.This was done as a cost-cutting measure by the manufacturer as H1 bulbs are cheaper to provide with the headlights than H11. That being said, whatever bulbs you currently have in your stock housing will NOT fit in these projectors, including any aftermarket HIDs or LEDs (like I had). You will have to buy new HID or LED type H1 bulbs if you want to replace the halogens included with the headlights. If you're fine with the stock amber halogen look, then no need to worry about this, however if your bulbs ever burn out in the future and you need to buy a replacement, its important to know this information so you don't accidentally buy H11 bulbs as your local auto store's database will tell you to buy.2. EVERY SINGLE HALO PROJECTOR SOLD FOR THE GTO ARE MADE BY THE SAME MANUFACTURER.I have seen these headlights listed here on amazon for as high as $280, and on other sites for upwards of $350. Spyder Auto is the manufacturer of these headlights, and no matter where you buy them from, or from who, they are all EXACTLY the same. Companies, like AKKON, purchase these in bulk for re-sale and slap their name on it. Every single one is the same, so don't be fooled and pay more than you have to. AKKON provided the cheapest ones I could find, so that's what I went with.Aside from those two points, these are really your only options for replacing stock GTO headlights without shelling out $800+ for OEM. As an added bonus, OEM housings are rare and sought after by purists, so if your stock headlights simply have corroded lenses but the housing is intact, you can re-sell the OEM housing for about the same price as these projectors will cost and come out even. Food for thought.Installation requires removing the front bumper, pretty straight forward but a little spooky if you've never done it before as the retaining clips feel like they're going to break when you pop em off. The only tools required are a philips head and a ratchet with a 10mm socket and extensions. Each headlight is held in by 3 10mm bolts, and two electrical connectors (one for H & L beams, one for turn signal). Depending on your specific GTO, you may need to add washers to get a little bit better fitment, but in the end this is an aftermarket product and it will not fit 100% perfectly as OEM will, so be prepared for at least a little panel gap. My bumper is pretty messed up from hitting so many cones at autox, so I had a good amount of gap. Results may vary.I did not personally splice the halos & accessory lights as I was only looking for a cheaper alternative to OEM, but Spyder has a few videos on youtube for splicing these and it's the same for any car. Real simple as well, even for a first timer, just take your time and be patient.I hope this review provides you with adequate information to make an informed purchase! In the end, while they are not perfect, it's better than the price of OEM headlights. Four stars for a decent product but docking 1 star for the stupid H1 bulb decision.China made but still look good. Cheaper than OEM. Install was simple no instructions though. Just tap in to the brown wire for your indicator light for positive power to the led lights and halo rings. Black and white wire for negative. Housing is a little tricky to install LED bulbs to replace the halogen bulbs that it comes with but it's possible with a little modification to the housing. Overall pleased.They work great and look great! Cant beat this deal!The passenger adjustment screw is on the wrong side of the headlight with no way to access it unless you take out the headlight again.These headlights work really great and look really good on the GTO but the only concern is the headlights overheat really fast and get extremely hot in a short period of time some thing that needs to be watched for.