I just got the OEM Sport spoiler. Comfortable drilling under chrome lip, but do not want to drill the outside two holes for the snap piece (the two outermost holes shown on the diagram. I see some sedan owners get away with not doing the outside drilling, and was said to be sturdy enough. Have you taken this route on the coupe? If so, is it sturdy, or would you have opted to drill the outside?

Reason being, is because I want to ultimately get another trunk lid to debadge (since mine was improperly glued), and rather not deal with the headache for a bad paint match.

Also, confused on the diameter specs for drilling. Could someone help clarify? Is it 3mm pilot to a bigger 18mm? Hope I explained this right.

 

Yes, all the 3mm are the pilot holes so your larger bits will center properly. As far as the outside holes for the push clips, my Sedan spoiler has held firm for about 5 years now w/ just the double sided tape holding that down, the coupe shouldn't really be any different but maybe someone can chime in that's also not drilled the outer 2 holes. There are quite a few fasteners holding the body of the spoiler down and that tape does a nice job as well. ****Also be sure to spray some primer on some Q-tips and swab the drilled holes to help w/ rust prevention.

 

You were the guy I saw do it.

Just being honest, a 18 mm hole saw out there is unforgiving...

If I could take your route, I would be very happy..

 

Be sure to do a test fit, if the spoiler is laying real flush along the whole surface it won't take much adhesion to keep it there. If you lay the spoiler down and the ends are rising and will take some force to get it laying tight then???

 

On another note, those hole sizes seem huge, I didn't have the instructions or hardware sent w/ mine so I don't know what size the clips were, but about a 3/4" hole seems way larger than what those push clips would require, they should only be about a 1/2" at most going by what pics I've seen????

 

Right!? The clips themselves are huge. I thought the same thing too, until I measured them up next to the ruler. Another reason I am not too fond of the design of that clip.

 

I installed the OEM spoiler and drilled ALL the holes. You don't use a hole saw you can use one of those variable stepped drill bits. You should use more than primer on the holes (as the instructions suggest), us a rust preventer. BTW, the holes for those larger ones dont have to be exact, a close SAE size is fine.
https://www.amazon.com/dp/B000RP82F8...R4HJJ0JX45NTNM

 

Yeah, greatly considering the step bit for drilling. But another coupe person said he used 3M tape as well for the outside drill, and opted out of the drilling. If I can get away with it, I will.

 

That's pretty much the bit I used

 

Wow I looked everywhere for this template, couldn't find it 3 years ago. Anyway I ended up 3M taping my spoiler down and it's been on there rock solid ever since. Good luck!