Anyone know where I can get the bolts that hold this 99 ex/si spoiler in, or what size they are?

 

They are M6x1.0 cap nuts as originally installed. Honda Part # 90307-S03-000

90307-S03-000 - Genuine Honda Nut, Spoiler Cap (6MM) (hondapartsnow.com)

 

those are for the hatch spoiler it says, do they use the same bolts on the coupes? I still can’t find the one that holds in the 99ex/si coupe spoiler

 

You just need an M6 cap nut. I grabbed the first part number I found.

They are hard to find in the parts catalog because the spoilers were dealer installed accessories on all trims. If you can find the installation instructions online somewhere, they should also have the drilling template. You will be missing the stiffened trunk springs, so the lid is going to fall pretty aggressively with the spoiler mounted.

 

Ahhhh okay I see, I’ll buy the ones you sent the link for they are cheap so if they don’t fit it’s not a huge loss and see how well they work, and I figured that it would definitely be heavier, maybe I should look into trunk support or something😂

 

so those bolts ended up not fitting, I got some 10mm cap nuts that were m6x1.0 and those did not fit either I’m thinking maybe it 1.25 or 1.50 instead of 1.0