The best I can measure on my raceseng ones is just shy of 20mm so probably an M20 thread. I don't have a coarse enough thread gauge to tell you any better but that's my best guess.
I'm thinking of doing a custom project on my Supra that would involve the rear reflectors. Ideally I'd prefer to have a set of clear lenses to make it work, but I haven't been able to find any. I found a set of smoked ones on Amazon that I ordered, but I'm worried that the smoke might block too...
Sundays at 11 AM in Windermere (Edmonton) there's a Cars and Coffee at the TD bank (next to Tim Hortons) I think I'm free on the 11th so I'll likely come by with my RS3.
Has anyone that's done this used longer ports and cut the metal part to allow for the extra port length? Would that help or hurt the sound response and quality?
Just got an update from my dealer. It's showing port processing in Halifax and ETA of July 3-7 now ☹️
I was planning on taking it on a road trip leaving on the 29th of June, so I hope that it's earlier than estimated.