Lay out the parts in a way that you won't lose anything. You will need some VERY good penetrating oil, a torx driver set, some extra alcohol is good, some degreaser, and whatever you use to wax your car.

I recommend waxing the spoiler first. Make sure the paint has cured long enough. Depending on where you get it painter, they can say anything from a week, to a couple weeks. It just makes things easier. It's easier to wax the spoiler off then on.

You will have to remove the plastic panels on the hatch and make the necessary cuts to remove enough plastic to allow the supports through.

Spray the penetrating oil on the screws. Depending on the age of your car, and the weather in your area, they could be very rusted. It helps to get a torx driver with a screwdriver handle. If very stubborn, allign the torx driver with teh screw, and tap with a hammer. This just helps to break the screw away from the corrosion. Be VERY careful to not round the screw heads.

Remove one screw and ONLY one screw. It shouldn't make that much of difference, but I believe it's the one closer to the front of the car when the door is fully open. Then replace it with the longer screw in the kit.

Then place the metal plate so that when you thread a nut to the back of the longer bolt supplied with the kit, it'll hold the plate in place. Tighten hand tight (don't over tighten yet).

Remove the other nut. Replace with the longer nut and bolt to the plate on the back.

Now thouroughly degrease the part of the hinge that will be covered by the support for the spoiler with degreaser and alcohol. Wait to dry.

Apply clear adhesive plastic sheet so that the plate and screws are covered.

Bolt the support to the longer bolts you just put in.

Repeat on the other side.

Do a test fitting of the spoiler. Notice the metal threads in the spoiler for mounting. The support has elongated holes so minor adjustments can be made.

Thouroughly clean the glass where spoiler meets it with degreaser and alcohol and the spoiler where the adhesive will be applied. This padded adhesive patch is primarily to prevent the spoiler from bouncing and vibrating on the glass, NOT for support! Wait to dry.

Apply the adhesive strip to the spoiler. This is where two people come in handy. You must try to lower the spoiler so that spoiler meets the supports as intended while not allowing the adhesive patches to stick before everything is alligned. It helps to try to allign the spoiler's metal thread inserts with the supports cut outs.

Apply some pressure to the spoiler to create good contact. Tighten down the nuts.

Important notes! Try to be careful with the penetrating oil and degreaser. They are pretty horrible to paint. Clean them up quickly and as you work. Wax every part of the car that got contaminated. If required, clean the windows of penetrating oil with degreaser and alcohol.

The entire job takes about 1-2 hours depending on how difficult the bolts are. Two of the four bolts on my hinges were so correded, the best penetrating oils weren't enough. I had to use a torx with a screwdriver handle and a hammer to tap them free. If you don't have a problem with the bolts, you could be done in an 1 flat. But with clean up, everything should be done between 1-2 hours.

IF you have anymore questions, feel free to ask.