Re: Installing a Rear Spoiler
Make sure you find the exact center line for you spoiler and deck lid, to lay out the template or measurements.
I used the tape method listed above, and then put some blue valve marking compound on the spoiler studs to check for any deviation between my marks and the studs. It helped to have the center marked to make sure the spoiler was where it needed to be. I used a small bit (#30) first then stepped up the holes to final size with a reamer. I also use the thin rubber washers, works nice, no water in the trunk.