Please be sure to refer to the installation instructions provided by the manufacturer. This guide is only provided to give you an idea of what is required to install a wing or spoiler onto your car.
Pre-Installation
Prep Work
Start by removing the plastic trunk lining if it exists. To
do so, using the screw driver pop off the little plastic clips
attaching it from the insides. Don't damage them, you'll need
them later to reinstall the lining.
Once the lining is out, assemble the wing brackets. If the wing
you purchased doesn't fit the curve of your brackets, use automotive
weather stripping and place it between the wing and brackets
and then using the hex wrenches, slowly secure the deck to the
brackets.
Now place packaging tape on the trunk where the brackets will
mount and line it up on the trunk where you would like it installed.
The easiest method is to simply place the assembled wing onto
the trunk and with a marker or pen mark where the tenative holes
for the screws are supposed to go. Don't install the wing backwards.
If you are not sure which way it goes, ask someone. After marking
the holes, remove the wing from the trunk.
Using safety goggles and your drill, begin by using a smaller
bit than the what your screws are. Slowly drill the required
holes into the trunk, and progress to a bigger bit until the
holes are suitable for your screws. Be sure to drill completely
through the first sheet metal (top of trunk) and the second
sheet metal (below). Once the holes are 1 size larger than the
required bolt diameter, vaccuum and get rid of the metal scraps
to prevent cutting yourself or scratching your car.
From underneath the trunk, inside the car, slowly drill UP through
the holes you just punched through the other side.. You want
to make the holes larger on the inside so you can get a deep
socket through here to secure the wing to it. Use the largest
bit you have, probably like a half inch or so, this should clear
your smallest deep 10mm socket.
Using the dremel, be sure to soften the edges of your holes,
make sure you dont poke yourself with the burrs and then using
the touchup paint, coat the outsides of the holes so they dont
rust in the rain.
Attaching Wing To Trunk
Now that you've prepared the trunk for installation, place the wing on top of the trunk and line up the holes on the spoiler with the ones you drilled into your trunk. From underneath the trunk lid (and assistance from a friend) tighen the bolts to the deck. This may take some time due to the confined movements from underneath the lid. Be sure you attach the washers, these not only secure the wing on but they will also hold your wing in place if someone tries to rip off your wing.
Tighten the wing to the trunk, be sure NOT to dimple the trunk while doing so. if you successfully attached the wing, the wing should not wiggle much side to side, for there is equal pressures on all 8 or so screws holding the wing to the trunk's sheet metal.
When driving you might see the wing slightly vibrate, that's normal due to how thin the sheet metal on top of the trunk is, but it should not sway violently. If that is the case, adjust the angle of the wing because it may be lopsided so it doesn't rip off your car while driving.