so i just removed my ac and the lines, and wanted to know what size plugs i need to plug up the open holes in the firewall. thanks!

 

you can get the oem 'sticker' from STM that covers the area in the firewall. you have to remove the plastic piece in order for the sticker to sit flush. I actually used a square piece of felt tape on mine when I deleted my a/c.

 

Buschur Racing sells the OEM sticker that is used to block off the hole/space. It is only like $10-$15 ish

 

just get that OEM sticker from Buschur.